Transcript
Page 1: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

Oxford Cambridge and RSA Examinations

GCE

Biology

Advanced GCE F212

Molecules, Biodiversity, Food and Health

Mark Scheme for June 2010

Page 2: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing a wide range of qualifications to meet the needs of pupils of all ages and abilities. OCR qualifications include AS/A Levels, Diplomas, GCSEs, OCR Nationals, Functional Skills, Key Skills, Entry Level qualifications, NVQs and vocational qualifications in areas such as IT, business, languages, teaching/training, administration and secretarial skills. It is also responsible for developing new specifications to meet national requirements and the needs of students and teachers. OCR is a not-for-profit organisation; any surplus made is invested back into the establishment to help towards the development of qualifications and support which keep pace with the changing needs of today’s society. This mark scheme is published as an aid to teachers and students, to indicate the requirements of the examination. It shows the basis on which marks were awarded by Examiners. It does not indicate the details of the discussions which took place at an Examiners’ meeting before marking commenced. All Examiners are instructed that alternative correct answers and unexpected approaches in candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated. Mark schemes should be read in conjunction with the published question papers and the Report on the Examination. OCR will not enter into any discussion or correspondence in connection with this mark scheme. © OCR 2010 Any enquiries about publications should be addressed to: OCR Publications PO Box 5050 Annesley NOTTINGHAM NG15 0DL Telephone: 0870 770 6622 Facsimile: 01223 552610 E-mail: [email protected]

Page 3: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

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Ma

rk S

ch

em

e

Ju

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20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

1(a

)(i

)

rea

ge

nt

ob

se

rva

tio

nm

ole

cu

le

pre

se

nt

or

ab

se

nt

eth

an

ol

an

d w

ate

r w

hite

e

mu

lsio

n

lipid

p

rese

nt

Be

ne

dic

t’s

so

lutio

n

bri

ck-r

ed

p

recip

ita

te

red

ucin

g s

ug

ar

/ la

cto

se

/ g

luco

se

/

ga

lacto

se

/

mo

no

sa

ccha

rid

es

pre

se

nt

;

b

iure

t I

an

d I

I

lila

c c

olo

ur

pro

tein

/ n

am

ed

m

ilk p

rote

in

pre

se

nt

;

iod

ine

so

lutio

n

ye

llow

/

bro

wn

sta

rch

/ a

mylo

se

a

bse

nt

;

3

On

e m

ark

pe

r co

rre

ct

row

.

IGN

OR

E ‘ye

s’, ‘n

o’ an

d t

icks a

nd

cro

sse

s

DO

NO

T C

RE

DIT

if

an

yth

ing

in

co

rre

ct

is w

ritt

en in

an

y

bo

x in

th

e m

ole

cu

le c

olu

mn

.

e.g

. ‘s

tarc

h o

r ce

llulo

se

’ =

0 m

ark

A

CC

EP

T m

alto

se

DO

NO

T C

RE

DIT

su

cro

se

A

CC

EP

T c

ase

in /

lacto

glo

bu

lin /

lacta

lbu

min

/

po

lyp

ep

tid

e

IGN

OR

Ea

mylo

pe

ctin

1(a

)(i

i)m

ilk is a

lre

ad

y,

clo

ud

y /

an

em

uls

ion

/ w

hite

/ A

W ;

1

AC

CE

PT

id

ea

of

difficulty in

de

tectin

g c

ha

ng

e b

eca

use

of

the

ap

pe

ara

nce

of

milk

1(a

)(i

ii)

(on

e)

gly

ce

rol /

gly

ce

ride

;3

fa

tty a

cid

s ;

este

r b

on

d (

be

twe

en

gly

ce

rol a

nd

fa

tty a

cid

) ;

3

AC

CE

PT

ma

rkin

g p

oin

ts f

rom

cle

arl

y la

be

lled

dia

gra

m

bu

t D

O N

OT

CR

ED

IT if

co

ntr

ad

icte

d in

te

xt.

IGN

OR

E in

div

idu

al a

tom

s o

n d

iag

ram

an

d lo

ok f

or

co

rre

ct

po

sitio

n o

f la

be

ls

MA

X 2

if

ph

osp

ha

te g

rou

p in

clu

de

d (

as c

ou

ld b

e

co

nfu

se

d w

ith

ph

osp

ho

lipid

)

AC

CE

PT

on

dia

gra

m if

3 s

ho

wn

an

d a

t le

ast

on

e la

be

lled

A

CC

EP

T t

rig

lyce

rid

es a

re e

ste

rs

1

Page 4: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

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rk S

ch

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10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

1(b

)

1 2 3 4 5 6 7 8 9

10

(th

erm

al)

in

su

latio

n ;

e

ne

rgy,

sto

re /

so

urc

e /

re

lea

se

;

pro

tectio

n ;

me

mb

ran

es

/ p

ho

sp

ho

lipid

bila

ye

r /

co

ntr

ol e

ntr

y a

nd

exit in

to c

ells

;

(ste

roid

) h

orm

on

es /

na

me

d s

tero

id h

orm

on

e ;

bu

oya

ncy ;

w

ate

rpro

ofin

g ;

so

urc

e o

f w

ate

r(f

rom

re

sp

ira

tio

n)

; (e

lectr

ical in

su

latio

n)

in m

ye

lin /

aro

un

d n

eu

ron

es /

a

rou

nd

axo

ns /

aro

un

d d

en

dro

ns ;

a

id,

ab

so

rptio

n /

sto

rag

e / p

rod

uctio

n, o

f,

fat

so

lub

le /

A /

D /

E /

K,

vita

min

s ;

3

MA

RK

TH

E F

IRS

T R

ES

PO

NS

E O

N E

AC

H N

UM

BE

RE

D

LIN

E

1A

LL

OW

‘w

arm

th’

2C

RE

DIT

an

sw

ers

th

at

refe

r to

th

e ide

a o

f lip

id a

s a

resp

ira

tory

su

bstr

ate

bu

t D

O N

OT

CR

ED

IT ‘fo

r

resp

ira

tio

n’ u

nq

ua

lifie

d

IG

NO

RE

‘fa

t co

nta

ins e

ne

rgy’ w

ith

ou

t fu

rth

er

q

ua

lific

atio

n

DO

NO

T C

RE

DIT

re

fs t

o p

rod

ucin

g e

ne

rgy o

r to

qu

ick

e

ne

rgy r

ele

ase

A

CC

EP

T ‘p

rovid

es e

ne

rgy’

4C

RE

DIT

re

f to

ch

ole

ste

rol in

me

mb

ran

es

9C

RE

DIT

ne

rve

fib

res /

sa

lta

tory

co

nd

uctio

n

IG

NO

RE

ne

rve

s

1(c

)(i

) sa

tura

ted

;

(fa

tty a

cid

s h

ave

) n

o /

fe

we

r, d

ou

ble

bo

nd

s ;

so

lid a

t ro

om

te

mp

era

ture

;

1

ma

x

Assu

me

an

sw

ers

re

fer

to a

nim

al fa

ts u

nle

ss o

the

rwis

e

sta

ted

A

CC

EP

T r

eve

rse

arg

um

en

t

IGN

OR

E r

ef

to f

ats

an

d o

ils (

as s

tate

d in

qu

estio

n)

AC

CE

PT

‘fa

tty a

cid

s a

re n

ot

kin

ke

d’

AC

CE

PT

re

aso

na

ble

tem

pe

ratu

re q

uo

ted

2

Page 5: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

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rk S

ch

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e

Ju

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10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

1(c

)(i

i) 1 2 3 4 5

(de

ath

ra

te f

or)

me

n g

rea

ter

(at

an

y c

on

ce

ntr

ation

) /

AW

;

(de

ath

ra

tes)

rise

with

incre

asin

g c

ho

leste

rol /

AW

;

de

ath

ra

te fo

r m

en

, in

itia

lly /

AW

, fa

lls ;

ste

ep

(er)

/ A

W,

rise

(in

, m

ale

s /

bo

th)

a

t h

igh

er

cho

leste

rol le

ve

ls ;

co

mp

ara

tive

fig

ure

s w

ith u

nit f

or

(blo

od

) ch

ole

ste

rol

to s

up

po

rt a

ny o

f th

e a

bo

ve

po

ints

;

3 m

ax

1

AC

CE

PT

ora

2A

CC

EP

T ‘p

ositiv

e c

orr

ela

tio

n’ (b

etw

ee

n d

ea

th a

nd

ch

ole

ste

rol)

3

AC

CE

PT

4.8

or

be

low

as ‘in

itia

lly’.

4

An

sw

ers

mu

st

refe

r to

la

tte

r p

art

of

gra

ph

on

ly (

5.7

or

a

bo

ve

).

A

CC

EP

T d

iffe

ren

ce

(b

etw

ee

n s

exe

s)

gre

ate

r a

t h

igh

co

nce

ntr

ation

5

Th

ere

are

3 w

ays o

f g

ett

ing

th

is m

ark

:

!

va

lue

s f

or

bo

th s

exe

s a

t sin

gle

co

nce

ntr

atio

n

!

tw

o v

alu

es f

or

sin

gle

sex a

t tw

o c

on

ce

ntr

atio

ns

!

su

btr

actio

n / c

alc

ula

tio

n, th

at

sh

ow

s c

om

pa

riso

n

IG

NO

RE

te

rms lik

e ‘a

bou

t’

S

ee

ta

ble

for

acce

pta

ble

exa

mp

les o

f x

an

d y

va

lue

s

if

inte

rme

dia

te c

ho

leste

rol va

lue

s a

re u

se

d,

refe

r to

the

gra

ph

for

the

da

ta

de

ath

s p

er

10

00

0

blo

od

ch

ole

ste

rol

(mm

ol

dm

-3)

wo

me

n

me

n

3.6

13

.2 -

14

.1

31

.2 -

32

.1

4.3

15

.0 -

15

.9

26

.0 -

26

.9

4.8

14

.0 -

14

.9

24

.0 -

24

.9

5.2

15

.1 -

16

.0

24

.6 -

25

.5

5.7

17

.4 -

18

.3

25

.8 -

26

.7

6.2

17

.8 -

18

.7

33

.2 -

34

.1

6.7

23

.5 -

24

.3

31

.3 -

32

.2

7.3

22

.0 -

22

.9

44

.1 -

45

.0

8.2

31

.7 -

32

.6

59

.5 -

60

.4

Mu

st

inc

lud

e (

blo

od

) c

ho

les

tero

l u

nit

s

A

ny f

igu

re w

ith

in a

pa

rtic

ula

r ra

ng

e i

s a

cc

ep

tab

le

3

Page 6: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

1(c

)(i

ii) 1 2 3 4

co

ron

ary

he

art

dis

ea

se

/ C

HD

/ c

ard

io-v

ascu

lar

dis

ea

se

s /

h

ea

rt a

tta

ck / c

ard

iac a

rre

st

/ m

yo

ca

rdia

l in

farc

tion

/ M

I /

a

ng

ina

;

ath

ero

scle

rosis

/ a

the

rom

a ;

str

oke

;

Typ

e 2

dia

be

tes ;

2

Ma

rk f

irs

t tw

o in

lis

t

1 D

O N

OT

CR

ED

IT h

ea

rt d

ise

ase

alo

ne

or

‘co

na

ry’

A

CC

EP

T h

yp

ert

en

sio

n /

hig

h b

loo

d p

ressu

re

2 D

O N

OT

CR

ED

IT a

rte

rio

scle

rosis

T

ota

l1

6

4

Page 7: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

2(a

)p

lacin

g,

livin

g t

hin

gs /

org

an

ism

s /

na

me

d o

rga

nis

ms,

into

, g

rou

ps /

ca

teg

ori

es /

ta

xa

/ n

am

ed

ta

xo

no

mic

gro

up

s ;

ba

se

d o

n /

AW

, sim

ilari

ty /

diffe

ren

ce

;

2

AC

CE

PT

‘g

rou

pin

g liv

ing t

hin

gs’

Lo

ok f

or

the

id

ea

of

sim

ilar

org

an

ism

s b

ein

g p

lace

d in

th

e

sa

me

gro

up

or

diffe

ren

t o

rga

nis

ms b

ein

g p

lace

d in

d

iffe

ren

t g

rou

ps

2(b

)(i

) 1 2 3 4 5

mo

rph

olo

gy /

an

ato

my /

(o

bse

rva

ble

/ p

hysic

al)

fea

ture

s /

a

pp

ea

ran

ce

/ A

W ;

b

ioch

em

istr

y /

cyto

ch

rom

e C

;

ge

ne

s /

DN

A /

ge

ne

tics / R

NA

;

be

ha

vio

ur

/ p

hysio

log

y /

em

bry

olo

gy ;

id

ea

of

sh

are

d,

evo

lutio

na

ry p

ast

/ p

hylo

ge

ny ;

3 m

ax

AC

CE

PT

su

ita

ble

ex

am

ple

s f

or

mp

s 1

to

4

1

CR

ED

IT c

ell

fea

ture

s

e.g

. n

ucle

us /

me

mb

ran

e-

b

ou

nd

org

an

elle

s /

ce

ll w

all

/

pro

ka

ryo

tic-e

uka

ryo

tic fe

atu

res /

un

ice

llula

r

2

CR

ED

IT c

om

po

ne

nt

of

ce

ll w

all

3IG

NO

RE

ch

rom

oso

me

s

4A

CC

EP

T ‘h

ow

th

ey f

ee

d’ /

nu

tritio

n /

‘ho

w t

he

y r

ep

rod

uce

5A

CC

EP

T ‘h

ow

clo

se

ly r

ela

ted

IGN

OR

E r

efs

to

in

terb

ree

din

g /

fe

rtile

off

sp

rin

g

2(b

)(i

i)T

S R

W U

Q ;

; ;

3

Ma

rk t

he

ord

er

of

lett

ers

(ig

no

rin

g th

e d

ott

ed

lin

es)

All

6 in

co

rrect

ord

er

= 3

ma

rks

If a

ny in

co

rre

ct,

th

en

cre

dit

T S

in

ord

er

at

be

gin

nin

g =

1 m

ark

U

Q in

ord

er

at

en

d =

1 m

ark

R

be

fore

W a

nyw

he

re in

th

e s

eq

ue

nce

= 1

ma

rk

5

Page 8: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

2(c

)

1 2 3 4 5 6

3 d

om

ain

s A

ND

5 k

ing

do

ms ;

d

om

ain

s a

re,

ba

cte

ria

/ e

ub

acte

ria

, A

ND

,

arc

ha

ea

/ a

rch

ae

ba

cte

ria

, A

ND

,

e

uka

rya

/ e

uka

ryo

tes ;

kin

gd

om

s a

re p

roka

ryo

tes A

ND

pro

toctists

AN

D f

un

gi A

ND

pla

nts

AN

D a

nim

als

;

eu

ka

ryo

tes s

plit

in

to d

iffe

ren

t kin

gd

om

s /

all

eu

ka

ryo

tes a

re in

th

e s

am

e d

om

ain

; a

ll p

roka

ryo

tes a

re in

th

e s

am

e k

ing

do

m /

pro

ka

ryo

tes s

plit

in

to d

iffe

ren

t d

om

ain

s ;

do

ma

in c

lassific

atio

n b

ase

d o

n,

r RN

A /

rib

oso

me

s /

RN

A p

oly

me

rase

/

pro

tein

syn

the

sis

/ e

nzym

es /

fla

ge

lla /

mem

bra

ne

str

uctu

re ;

4

ma

x

AC

CE

PT

ph

on

eti

c s

pe

llin

gs

th

rou

gh

ou

t A

CC

EP

T a

lte

rna

tive

te

rms f

or

na

me

s o

f kin

gd

om

s a

nd

d

om

ain

s t

hro

ug

ho

ut

(e.g

. p

lan

ts /

pla

nta

e)

2A

CC

EP

T ‘e

uka

ryo

ta’

3D

O N

OT

CR

ED

IT p

rotists

/ p

roto

zoa

6IG

NO

RE

RN

A u

nq

ua

lifie

d

DO

NO

T C

RE

DIT

oth

er

form

s o

f R

NA

AC

CE

PT

an

y d

eta

il o

f p

rote

in s

yn

the

sis

T

ota

l1

2

6

Page 9: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

3(a

) yo

un

g /

eld

erl

y /

HIV

in

fecte

d /

ma

lno

uri

sh

ed

/

po

st-

op

era

tive

/ o

n im

mu

no

su

pp

ressa

nts

/ le

uka

em

ia /

un

de

rgo

ing

ca

nce

r tr

ea

tme

nt

/ a

no

rexic

s ;

imm

atu

re /

co

mp

rom

ise

d /

we

ak /

AW

, im

mu

ne

syste

m ;

2

IGN

OR

Ep

rom

pt

line

s a

nd

ma

rk t

he

an

sw

er

as a

wh

ole

AC

CE

PT

AW

fo

r yo

un

g /

eld

erl

y e

tc

IGN

OR

E‘il

l’ o

r ‘u

nfit’

IGN

OR

Ea

ny r

efe

ren

ce

to

po

pu

latio

ns

e

.g.

tho

se

liv

ing

in

vic

inity o

f o

utb

rea

k A

CC

EP

T d

escri

ptio

n

A

CC

EP

T n

o im

mu

nity

3(b

)(i

) 1 2 3

4a

4b

4c 5 6

ba

cte

ria

/ (

ba

cte

ria

l) c

ells

, d

ivid

e /

incre

ase

in

num

be

r /

mu

ltip

ly /

re

pro

du

ce

/ p

rolif

era

te /

re

plic

ate

;

(se

cre

te)

enzym

es /

na

me

d e

nzym

e ;

fo

od

, d

ige

ste

d /

bro

ke

n d

ow

n ;

p

rote

in /

nam

ed

pro

tein

/ p

oly

pe

ptid

es !

pe

ptide

s /

am

ino

acid

s

OR

fat

/ tr

igly

ce

rid

es !

fa

tty a

cid

s

OR

sta

rch

/ a

mylo

se

/ g

lyco

ge

n !

glu

co

se

/ s

ug

ar

; p

rod

uctio

n /

re

lea

se

/ e

xcre

tio

n /

secre

tio

n,

of,

to

xin

s /

na

me

d t

oxin

/ w

aste

pro

du

cts

; (c

au

se

s)

cha

ng

e in

, a

ppe

ara

nce

/ s

me

ll /

textu

re /

ta

ste

;

3 m

ax

DO

NO

T C

RE

DIT

‘m

ou

ld’ –

pe

na

lise

on

ce

on

ly

1IG

NO

RE

‘gro

wth

D

O N

OT

CR

ED

IT ‘m

ito

sis

2D

O N

OT

CR

ED

IT e

xcre

te

An

sw

er

sh

ou

ld n

ot

imp

ly in

tra

ce

llula

r e

nzym

es

4b

IG

NO

RE

ch

ole

ste

rol

4c

AC

CE

PT

oth

er

co

rre

ct

ca

rbo

hyd

rate

bre

akd

ow

n

6C

RE

DIT

su

ita

ble

exa

mp

le

e.g

. ‘g

oe

s m

ush

y’

7

Page 10: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

3(b

)(i

i) 1 2 3 4 5 6 7

ba

cte

ria

, re

pro

du

ce

/ A

W,

mo

re r

ap

idly

/ f

aste

r ;

(so

) m

ore

ba

cte

ria

pre

se

nt

; m

ore

, to

xin

s /

wa

ste

, p

rod

uce

d /

re

lea

se

d /

AW

;

mo

re e

nzym

es,

se

cre

ted /

AW

;

en

zym

e,

actio

n f

aste

r / w

ork

s b

ett

er

/ m

ore

eff

ective

,

a

t h

igh

er

tem

pe

ratu

res ;

(s

ub

str

ate

an

d e

nzym

es h

ave

) m

ore

kin

etic e

ne

rgy ;

m

ore

, e

nzym

e-s

ub

str

ate

co

mp

lexe

s /

ES

C /

(s

ucce

ssfu

l) c

olli

sio

ns b

etw

ee

n s

ub

str

ate

an

d a

ctive

site

;

3 m

ax

Ide

a o

f ‘m

ore

’ is

ne

ed

ed f

or

all

ma

rkin

g p

oin

ts b

ut

it c

an

b

e s

tate

d o

nce

an

d lin

ked

to

mo

re t

ha

n o

ne

po

int.

!

e.g

. ‘m

ore

ba

cte

ria

secre

tin

g e

nzym

es’ =

mp

2 a

nd

4

AC

CE

PT

co

nve

rse

arg

um

en

t th

rou

gh

ou

t

AC

CE

PT

‘fu

ng

i’ /

‘mo

uld

’ in

pla

ce

of b

acte

ria

as q

ue

stio

n

ste

m d

oe

s n

ot

sp

ecify

1IG

NO

RE

‘g

row

IGN

OR

E ‘m

ore

ea

sily

’ or

‘eff

ective

ly’

D

O N

OT

CR

ED

IT if

the

ca

nd

ida

te th

inks t

he

re is n

o

re

pro

du

ctio

n a

t 5

°C

4 D

O N

OT

CR

ED

IT e

xcre

ted

5

IGN

OR

E o

ptim

um

8

Page 11: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

3(b

)(i

ii)

M1

E1

M2

E2

M3

E3

M4

E4

M5

E5

M6

E6

M7

E7

M8

E8

max 2

for

2 d

istinct

meth

ods

max 2

for

2 c

orr

ectl

y l

inked

expla

nations

Only

cre

dit t

he e

xpla

nation m

ark

if

the m

eth

od m

ark

has b

een a

wa

rde

d.

saltin

g ;

lack o

f w

ate

r d

ue t

o,

osm

osis

/ lo

w w

ate

r pote

ntia

l (o

uts

ide c

ell)

;

sugar

; la

ck o

f w

ate

r d

ue t

o,

osm

osis

/ lo

w w

ate

r pote

ntia

l (o

uts

ide c

ell)

;

(air /

fre

eze)

dry

ing ;

ide

a t

hat enzym

es c

ann

ot

mobili

se /

in

trace

llula

r tr

ansport

im

paire

d /

reactio

ns h

ave n

o m

ed

ium

in w

hic

h t

o o

ccur

/ (m

icro

bes)

ca

nnot

move ;

pic

klin

g /

(use o

f) v

ineg

ar

; (lo

w p

H)

den

atu

res /

chang

es t

ert

iary

str

uctu

re o

f /

chan

ges 3

D s

hape o

f, e

nzym

es /

pro

tein

sO

Rsubstr

ate

no lo

nger

fits

active s

ite /

active s

ite s

hap

e c

ha

ng

es /

pre

ve

nts

ES

C ;

heat

treatm

ent

/ cookin

g ;

den

atu

res /

ch

ang

es t

ert

iary

str

uctu

re o

f /

chan

ges 3

D s

hape o

f, e

nzym

es /

pro

tein

sO

Rsubstr

ate

no lo

nger

fits

active s

ite /

active s

ite s

hap

e c

ha

ng

es /

pre

ve

nts

ES

C ;

irra

dia

tio

n /

UV

/ g

am

ma r

ays /

X-r

ays /

ionis

ing r

ad

iatio

n ;

destr

oys /

dam

ages /

cha

nges /

muta

tes,

DN

A /

genes /

gen

etic m

ate

rial ;

sm

okin

g ;

(so e

xposed t

o)

antibacte

rial /

nam

ed a

ntib

acte

rial, c

hem

ical(s)

; vacuum

packin

g /

cannin

g /

bottlin

g ;

m

icro

org

an

ism

s c

annot

resp

ire a

ero

bic

ally

;

4

Where

more

th

an o

ne m

eth

od

is g

iven,

mark

first

on lin

e a

nd

assum

e

expla

nation lin

ked w

ith t

hat

DO

NO

T C

RE

DIT

chill

ing o

r fr

eezin

g (

as in q

uestion)

M1

IGN

OR

Edry

ing

E1

AL

LO

W low"

/ h

igh s

olu

te p

ote

ntial

M2

IGN

OR

Edry

ing

E2

AL

LO

W low"

/ h

igh s

olu

te p

ote

ntial

E4

DO

NO

T C

RE

DIT

hig

h p

H

M5

AC

CE

PT

paste

uri

sin

g

IGN

OR

E c

annin

g f

or

this

mp

E5,

E 6

& E

7

AC

CE

PT

‘kill

s b

acte

ria’ or

‘kill

s m

icro

bes’ as a

reaso

n s

up

port

ing h

eat

treatm

ent, irr

ad

iatio

n o

r sm

okin

g o

nly

on

ce

M6 C

RE

DIT

radia

tion if

corr

ectly q

ualif

ied in e

xpla

nation

M7

CR

ED

IT a

dditio

n o

f, s

ulp

hites /

sodiu

m b

enzoate

/

alc

ohol

E8

IG

NO

RE

‘denatu

ring

’ as a

conseq

ue

nce o

f cannin

g /

bo

ttlin

g

9

Page 12: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

1 2 3 4 5 6 7 8 9

10

11

Th

is is a

QW

C q

uesti

on

Ig

no

re s

ecti

on

s a

nd

mark

as c

on

tin

uo

us p

rose

low

(er)

/ le

ss, e

ne

rgy (

than b

eef)

;

usefu

l fo

r, s

limm

ing / w

eig

ht contr

ol / A

W ;

lo

w(e

r) / le

ss, (t

ota

l) fa

t ;

(very

) lo

w / (

much)

less, satu

rate

d fat ;

lo

wer,

ch

ole

ste

rol

OR

low

er

risk o

f, (

coro

na

ry)

hea

rt d

isea

se

/ C

HD

/

card

io-v

ascula

r dis

eases / h

eart

attack / c

ard

iac a

rrest /

myocard

ial in

farc

tion / M

I / angin

a /

ath

ero

scle

rosis

/ a

thero

ma /

str

oke / h

ypert

ensio

n ;

conta

ins c

arb

ohydra

te / A

W ;

lo

w(e

r) / le

ss, iro

n c

on

ten

t ;

(in

cre

ase

d r

isk o

f) a

na

em

ia / fe

we

r R

BC

s / le

ss h

ae

mo

glo

bin

/

red

uced

oxyg

en

carr

yin

g c

ap

acity o

f b

loo

d ;

lo

w(e

r) / le

ss, p

rote

in ;

(m

ycop

rote

in p

rovid

es)

mo

re b

ala

nced d

iet ;

need larg

er

inta

ke to m

eet re

quirem

ents

/ A

W ;

7 m

ax

Assum

e c

an

did

ate

is ta

lkin

g a

bo

ut m

ycop

rote

in u

nle

ss

oth

erw

ise s

tate

d.

CR

ED

IT o

ra fo

r beef th

roughout.

IGN

OR

E u

se

of fig

ure

s a

lon

e w

he

n a

ward

ing

mp

s 1

, 3, 6, 7, 9

– lo

ok fo

r d

esc

rip

tive

sta

tem

en

t, e

.g.

!

’12

g o

f p

rote

in’ =

no

ma

rk

!

‘on

ly 1

2 g

pro

tein

’ =

1 m

ark

(m

p 9

)

2

AC

CE

PT

pre

venting o

besity

A

CC

EP

T ‘le

ss e

nerg

y to b

urn

off d

urin

g e

xe

rcis

e’

DO

NO

T C

RE

DIT

‘burn

off’ unqualif

ied

6

AC

CE

PT

‘m

ore

carb

oh

yd

rate

th

an

be

ef’

IG

NO

RE

‘carb

s’

8IG

NO

RE

answ

ers

phra

sed in

te

rms o

f ro

le o

f iro

n a

lone

e.g

. ‘h

aem

oglo

bin

conta

ins iro

n’ =

0

Answ

ers

must show

consequence o

f deficie

ncy

e.g

. ‘le

ss h

aem

og

lob

in’ =

1

3(c

)

QW

C –

aw

ard

for

2 c

lear

refe

rences to the table

;

1

Aw

ard

for

2 s

ets

of com

para

tive fig

ure

s (

sta

ted

or

ca

lcu

late

d)

with u

nits –

‘conte

nt per

100g’ not needed

IGN

OR

E v

ague term

s lik

e ‘about’ a

s long

as fig

s a

re c

orr

ect

T

ota

l2

0

10

Page 13: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

4(a

)(i

) 1 2

(m)R

NA

is s

ing

le s

tra

nde

d /

DN

A is d

ou

ble

str

and

ed

; (m

)RN

A is n

on

he

lica

l / D

NA

is h

elic

al ;

1

Ma

rk t

he

fir

st

res

po

ns

e b

ut

do

no

t a

wa

rd t

he

ma

rk if

a

furt

he

r a

nsw

er

is in

co

rrect

or

co

ntr

adic

tory

D

O N

OT

CR

ED

IT r

efs

to

le

ng

th a

s g

ive

n in

ste

m

1A

CC

EP

T D

NA

is a

do

ub

le h

elix

(a

s s

tra

nd

ed

is

im

plie

d)

for

this

mp

DO

NO

T C

RE

DIT

DN

A is a

do

ub

le m

ole

cu

le

2A

CC

EP

T (

mR

NA

) n

ot

twis

ted

/ n

ot co

iled

/ n

ot

sp

ira

l /

str

aig

ht

/ o

ra

4(a

)(i

i) 1 2 3 4

RN

A c

on

tain

s r

ibo

se

an

d D

NA

co

nta

ins d

eo

xyri

bo

se

;R

NA

co

nta

ins,

ura

cil

/ U

, a

nd

DN

A c

on

tain

s,

thym

ine

/ T

;

3 /

mo

re t

ha

n 1

, fo

rms o

f R

NA

; R

NA

is,

sin

gle

str

an

de

d /

no

n h

elic

al,

an

d D

NA

is,

do

ub

le s

tran

de

d /

he

lica

l ;

if n

ot

alr

ea

dy a

wa

rde

d a

s a

nsw

er

in (

i)

1

Ma

rk t

he

fir

st

res

po

ns

e t

o (

a)(

ii)

bu

t b

ut

do

no

t a

wa

rd t

he

ma

rk if

a f

urt

he

r a

nsw

er

is in

co

rre

ct

or

co

ntr

ad

icto

ry

2D

O N

OT

CR

ED

IT thya

min

e

3A

CC

EP

T ‘o

ne

fo

rm o

f D

NA

4(a

)(i

ii)

ge

ne

;

1

IGN

OR

Ea

llele

/ o

pe

ron

4(a

)(i

v)

too

big

to

/ d

oe

s n

ot,

fit th

rou

gh

po

re (

in n

ucle

ar

en

ve

lop

e)

;1

AC

CE

PT

‘to

o lo

ng

to

fit …

po

re’

4(a

)(v

)id

ea

th

at

on

ly c

op

ies o

ne

, g

en

e /

sectio

n /

pa

rt /

AW

, (o

f D

NA

) ;

ide

a t

ha

t D

NA

co

mp

rise

s m

an

y,

ge

ne

s /

alle

les ;

2

e.g

. m

RN

A o

nly

co

de

s fo

r 1

pro

tein

DO

NO

T C

RE

DIT

‘1

DN

A m

ole

cu

le c

on

tain

s a

ll th

e

ge

ne

s’

‘mR

NA

on

ly c

od

es f

or

1 p

rote

in b

ut D

NA

co

de

s f

or

ma

ny

pro

tein

s’ =

2 m

ark

s

11

Page 14: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

4(b

)(i

) 1 2 3 4

no

n-c

om

pe

titive

(in

hib

itor)

;

(#-a

ma

nitin

/ in

hib

ito

r /

toxin

) fits

in

to,

a

lloste

ric s

ite

/ a

pla

ce

oth

er

tha

n a

ctive

site

;

active

site c

ha

ng

es,

sh

ap

e /

co

nfig

ura

tio

n /

co

nfo

rma

tio

n /

str

uctu

re ;

su

bstr

ate

no lo

ng

er,

fits / c

om

ple

me

nta

ry t

o,

active

site ;

2 m

ax

3

AC

CE

PT

‘d

isto

rtio

n o

f a

ctive

site

4M

ark

to

be

aw

ard

ed

in

co

nte

xt

of

active

site

(a

ltho

ug

h

n

ee

d n

ot

be

re

pe

ate

d if

sta

ted

in

mp

3)

I

GN

OR

E E

SC

4(b

)(i

i) 1 2 3

inh

ibits p

rodu

ctio

n o

f m

RN

A /

mR

NA

no

t p

rod

uce

d ;

pre

ve

nts

pro

tein

syn

the

sis

/ A

W ;

e

.g.

of,

sp

ecific

na

me

d p

rote

in /

(vita

l) p

roce

ss, th

at

ma

y b

e

aff

ecte

d ;

2 m

ax

1C

RE

DIT

pre

ve

nts

tra

nscri

ptio

n2

CR

ED

ITtr

an

sla

tio

n3

e

.g.

resp

ira

tio

n /

ph

oto

syn

the

sis

(as q

ue

stio

n r

efe

rs t

o

‘a

n o

rga

nis

m’)

/ h

ae

mo

glo

bin

/ c

yto

ch

rom

e C

oxid

ase

4(c

)(i

)se

qu

en

ce

/ o

rde

r, o

f a

min

o a

cid

s ;

1IG

NO

RE

nu

mb

er

/ o

rga

nis

atio

n

(c)

(ii)

A =

io

nic

;

B =

hyd

rog

en

;

C =

di s

ulfid

e (

bo

nd

/ b

ridg

e)

;

3

AL

LO

W p

ho

ne

tic s

pelli

ng

D

O N

OT

CR

ED

IT d

isu

lfa

te

4(d

)1 2 3 4 5

in

cre

ase

d k

ine

tic e

ne

rgy ;

(a

ny p

art

of

pro

tein

mo

lecu

le)

vib

rate

s ;

h

yd

rop

hili

c / h

yd

rop

ho

bic

/ h

yd

rog

en

/ io

nic

,

b

on

ds /

in

tera

ctio

ns,

bre

ak ;

ch

an

ge

in

, 3

D s

ha

pe

/ c

on

form

atio

n (

of

pro

tein

) ;

de

na

tur e

s ;

3 m

ax

1

mu

st

co

nta

in t

he

id

ea

of m

ore

th

an

no

rma

l

3

IGN

OR

E V

an

de

r W

aa

ls

D

O N

OT

CR

ED

IT if

dis

ulfid

e /

co

va

len

t /

pe

ptid

e

b

on

ds a

re inclu

de

d

4

IGN

OR

E t

ert

iary

/ s

tru

ctu

re (

as in

que

stio

n)

IG

NO

RE

refs

to

, a

ctive

site

/ e

nzym

es

T

ota

l1

7

12

Page 15: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

5(a

)(i

) m

ucu

s t

rap

s,

ba

cte

ria

/ m

icro

be

s /

pa

tho

ge

ns /

mic

roo

rga

nis

ms /

vir

use

s /

spo

res ;

cili

a, sw

ee

p /

mo

ve

/ w

aft

,

m

ucu

s /

ba

cte

ria

/ p

ath

og

en

s /

mic

roo

rga

nis

ms /

vir

use

s /

spo

re,

u

pw

ard

s /

AW

;

2

Fo

r b

oth

ma

rkin

g p

oin

ts A

CC

EP

T o

ra

for

wh

at

wo

uld

h

ap

pe

n if

the

y d

idn

’t w

ork

IGN

OR

E r

ef

to d

irt

/ d

ust /

etc

AC

CE

PT

an

sw

ers

th

at

imp

ly o

ut

of

air

wa

ys

e.g

. to

th

e t

hro

at

/ co

ug

he

d /

sw

allo

we

d

13

Page 16: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

5(a

)(i

i) 1 2 3 4 5 6 7 8 91

0

sta

ge

A

ph

ag

ocyte

, a

tta

ch

es /

bin

ds /

AW

, to

ba

cte

riu

m /

pa

tho

ge

n ;

re

ce

pto

r (o

n p

ha

go

cyte

),

att

ach

es t

o / b

ind

s t

o /

reco

gn

ise

s /

AW

,

a

ntig

en

(o

n b

acte

riu

m)

;

sta

ge

B

ba

cte

riu

m,

e

ng

ulfe

d /

en

ters

by e

nd

ocyto

sis

/

e

nte

rs b

y p

ha

go

cyto

sis

/ A

W ;

(f

orm

atio

n o

f) p

ha

go

so

me

/ p

ha

go

cytic v

acu

ole

;

sta

ge

C

lyso

so

me

s,

fuse

with

/ jo

in w

ith

/ m

ove

to

wa

rds (

ph

ag

oso

me

) ;

rele

ase

/ s

ecre

te,

e

nzym

es /

lysin

s /

na

med

en

zym

e /

hyd

rog

en

pe

roxid

e /

fre

e r

ad

ica

ls (

into

ph

ag

oso

me

) ;

sta

ge

C/D

b

acte

riu

m,

dig

este

d /

bro

ke

n d

ow

n /

hyd

roly

se

d ;

(t

o)

am

ino

acid

/ s

ug

ar

/ g

luco

se

/ f

atty a

cid

/ g

lyce

rol ;

sta

ge

Da

bso

rbe

d /

AW

, in

to,

cyto

pla

sm

/cyto

so

l ;

by,

(fa

cili

tate

d /

sim

ple

) d

iffu

sio

n /

active

tra

nspo

rt ;

6 m

ax

IGN

OR

Esta

ge

le

tte

rs a

nd

lo

ok f

or

corr

ect

se

qu

ence

D

O N

OT

CR

ED

IT s

tep

s t

ha

t a

re b

iolo

gic

ally

ou

t o

f se

qu

en

ce

, e.g

. m

p6

be

fore

mp

5.

Pe

na

lise

on

ce

on

ly.

AC

CE

PT

‘b

acte

ria

’ th

rou

gh

ou

t

2

CR

ED

IT P

AM

P /

an

tib

od

y m

ark

er

/

co

mp

lem

en

t m

ark

er,

as A

W f

or

an

tig

en

3

DO

NO

T C

RE

DIT

‘e

ate

n’

IG

NO

RE

pse

ud

op

od

ia o

r a

ny o

the

r str

uctu

re

5D

O N

OT

CR

ED

IT ‘

bin

ds w

ith

’ 7

DO

NO

T C

RE

DIT

de

str

oye

d (

as in

th

e q

ue

stio

n)

IGN

OR

E r

efs

to

an

tig

en

pre

se

nta

tio

n a

s t

his

ha

pp

en

s

aft

er

the

sta

ge

sh

ow

n in t

he

dia

gra

m

5(b

)(i

)p

lasm

a (

ce

ll) ;

1

AC

CE

PT

B lym

ph

ocyte

A

CC

EP

T e

ffe

cto

r ce

ll D

O N

OT

CR

ED

IT lym

ph

ocyte

un

qu

alif

ied

14

Page 17: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

(ii) 1 2 3 4 5 6 7 8 9

10

11

Th

is i

s a

QW

C q

ue

sti

on

Y-s

ha

pe

d m

ole

cu

le /

lig

ht

an

d h

ea

vy c

ha

ins /

dis

ulfid

e b

on

ds /

4 p

oly

pe

ptid

e c

ha

ins ;

co

nsta

nt re

gio

n ;

m

ark

er

for

/ b

ind

s t

o,

pha

go

cyte

s /

AW

;

va

ria

ble

re

gio

n ;

(a

ntib

od

y)

sp

ecific

ity ;

(h

as)

co

mp

lem

en

tary

sh

ap

e t

o a

ntige

n (

on

pa

tho

ge

n)

; h

ing

e (

reg

ion

) ;

allo

ws f

lexib

ility

;

mo

re t

ha

n o

ne

va

ria

ble

re

gio

n :

a

llow

s, ag

glu

tin

ation

/ d

escri

ptio

n o

f a

gg

lutin

atio

n

o

r

att

ach

me

nt

to m

ore

th

an

on

e,

pa

tho

ge

n /

an

tig

en

;

ne

utr

alis

ation

/ b

lockin

g p

ath

og

en

’s b

ind

ing

site

s ;

6 m

ax

CR

ED

IT a

co

rre

ctly la

be

lled

dia

gra

m t

ha

t is

cle

arly a

n

an

tib

od

y

CO

N if

dia

gra

m a

nd

te

xt

are

co

ntr

ad

icto

ry

MP

s 3

, 5

, 6

, 8

, 1

0 a

re s

tan

d a

lon

e b

ut

DO

NO

T C

RE

DIT

if c

on

text

is c

lea

rly in

co

rre

ct.

e

.g.

‘co

nsta

nt

reg

ion

giv

es s

pe

cific

ity’ A

WA

RD

mp

2 b

ut

no

t m

p 5

3

AC

CE

PT

re

f to

op

so

nis

atio

n

‘Co

mp

lime

nta

ry s

ha

pe

to

sp

ecific

an

tig

en

’ =

2 m

ark

s

(mp

s 5

& 6

) 8

IG

NO

RE

‘m

ove

me

nt’ u

nq

ua

lifie

d

9

DO

NO

T C

RE

DIT

fro

m d

iag

ram

un

less m

ore

th

an

on

e

is

exp

licitly

la

be

lled

or

cle

arl

y k

eye

d (

e.g

. b

y s

ha

din

g)

11

AC

CE

PT

re

f. t

o a

ntito

xin

5(b

)

QW

C–

aw

ard

wh

en

2 m

ark

s a

re g

ive

n in

an

y t

wo

of

the

gro

up

ed

se

ctio

ns ;

1

2 m

ark

s h

ad

be

en

aw

ard

ed

fro

m 2

of

the

fo

llow

ing

g

rou

ps o

f m

ark

s (

4 m

ark

s in

to

tal)

mp

s 2

& 3

mp

s 4

& 5

/6

m

ps 7

& 8

mp

s 9

& 1

0

15

Page 18: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

5(b

)(i

ii)

typ

e o

f im

mu

nity

art

ific

ial a

ctive

art

ific

ial p

assiv

e

na

tura

l a

ctive

na

tura

l p

assiv

e

!"

;

1

DO

NO

T C

RE

DIT

if

mo

re t

ha

n 1

box is t

icke

d

DO

NO

T C

RE

DIT

a c

ross

DO

NO

T C

RE

DIT

a t

ick t

ha

t h

as b

ee

n c

rosse

d o

ut

an

d is

a ‘h

yb

rid

’ tick

T

ota

l1

7

16

Page 19: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

6(a

)1 2 3 4 5 6 7 8

bio

div

ers

ity (

of

he

ath

land

) ;

rare

/ e

nd

an

ge

red

, sp

ecie

s /

pla

nts

/ a

nim

als

/ f

un

gi /

org

an

ism

s /

na

me

d o

rga

nis

m ;

ra

rity

of

(th

is)

ha

bita

t ;

exa

mp

le o

f cu

rre

nt

leg

al sta

tus ;

(l

ike

ly)

red

uctio

n in

siz

e o

f, h

ab

ita

t / e

co

syste

m /

he

ath

lan

d ;

e

ffe

ct

of

redu

ce

d s

ize

on

via

bili

ty (

of

wh

ole

eco

syste

m)

; e

ffe

ct

on

, m

ove

me

nt

/ sp

rea

d,

of,

spe

cie

s /

na

me

d s

pe

cie

s /

pla

nts

/ a

nim

als

;

a m

eth

od

of

min

imiz

ing

im

pa

ct

/ A

W /

na

me

d e

xa

mp

le ;

3 m

ax

4e

.g.

N

atio

na

l P

ark

/ S

SS

I /

pro

tecte

d s

pe

cie

s /

Na

tio

na

l N

atu

re R

ese

rve

s /

NN

R /

oth

er

leg

al exa

mp

le

5IG

NO

RE

‘h

ab

ita

t d

estr

uctio

n’ a

lon

e.

M

ust

refe

r to

exte

nt

or

siz

e o

f d

estr

uctio

n.

7

CR

ED

IT e

ffe

ct

on

wild

life

co

rrid

ors

An

sw

ers

co

uld

re

fer

to lim

itin

g s

pe

cie

s s

pre

ad

or

in

tro

du

ctio

n o

f sp

ecie

s

8

e.g

. ‘to

ad

tu

nn

els

’ /

relo

cation

of

po

pu

latio

n

‘bu

ild t

oa

d tu

nn

els

so

tha

t th

e t

oa

ds c

an

still

mo

ve

b

etw

ee

n t

he

tw

o a

rea

s o

f h

ea

thla

nd

’ =

2 m

ark

s (

mp

s 7

a

nd

8)

6(b

)(i

) 1 2 3 4 5

ide

a o

f (c

olle

ct

in)

diffe

ren

t /

wid

er,

are

a ;

(c

olle

ct

at)

diffe

ren

t,

t

ime

s o

f d

ay /

tim

es o

f ye

ar

/ w

ea

the

r co

nd

itio

ns ;

u

se

of

na

me

d,

co

llectin

g / id

en

tify

ing

, te

ch

niq

ue

;

me

tho

d o

f e

nsu

rin

g t

ha

t in

div

idu

als

no

t co

un

ted

ag

ain

;

ma

rk-r

ele

ase

-re

ca

ptu

re / c

ap

ture

-reca

ptu

re,

tech

niq

ue

;

3 m

ax

1A

LL

OW

se

ve

ral tr

an

se

cts

e.g

. a

no

the

r p

ath

3

e.g

. (s

we

ep

) n

et

/ p

ho

tog

rap

hs /

fe

ed

ing

sta

tio

ns

IG

NO

RE

po

ote

r (a

s c

ou

ld o

nly

ca

tch la

rva

e)

/

lig

ht

tra

p /

use

of

ke

y /

sin

gle

tra

nse

ct

4

Th

is m

ark

re

fers

to

an in

itia

l o

r th

e o

nly

sa

mp

le –

it is n

ot

linke

d t

o m

p 5

5

CR

ED

IT c

ou

nt

ma

rke

d in

div

idu

als

in 2

nd s

am

ple

/

p

op

ula

tio

n =

no. in

1st s

am

ple

x n

o. in

2nd s

am

ple

no. re

trapped in 2

nd s

am

ple

17

Page 20: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

6(b

)(i

i)

sp

ecie

s

n

n/N

(n

/N)2

Gra

ylin

g

(Hip

pa

rch

ia s

em

ele

)

La

rge

He

ath

(C

oe

no

nym

ph

a t

ulli

a)

0

.35

48

;

Ga

teke

ep

er

(Pyro

nia

tyth

on

us)

Gre

en

Ha

irstr

ea

k

(Ca

llop

hry

s r

ub

i)

Silv

er-

stu

dd

ed

Blu

e

(Ple

be

ius a

rgu

s)

Sm

all

He

ath

(C

oe

no

nym

ph

a

ph

am

hylu

s)

Sum

($

) 0

.31

63

3O

R0

.31

21

7;

1 -

$

D =

0.6

83

67

OR

0

.68

78

3

;

3

Ori

gin

al ta

ble

on

qu

estion

pa

pe

r h

ad

in

co

rre

ct

figu

re in

(n

/N)2

co

lum

n f

or

Gra

ylin

g r

ow

. A

nsw

ers

fo

r m

ps 2

& 3

ta

ke

th

is in

to a

cco

un

t.

AC

CE

PT

ecf

fro

m in

co

rre

ct

an

sw

er

for $

(w

he

the

r

de

cim

al p

lace

s o

r ro

un

din

g)

6(b

)(i

ii) 1 2

ma

ny s

pe

cie

s p

rese

nt

/ h

igh

sp

ecie

s r

ich

ne

ss /

all

sp

ecie

s e

ve

nly

re

pre

se

nte

d /

hig

h s

pe

cie

s e

ve

nn

ess /

hig

h b

iod

ivers

ity ;

(s

o)

sh

ou

ld n

ot

be

de

ve

lop

ed

/

d

eve

lop

me

nt

sh

ou

ld b

e m

od

ifie

d /

d

eve

lop

me

nt

sh

ou

ld b

e r

eco

nsid

ere

d /

sh

ou

ld b

e c

on

se

rve

d /

AW

;

2

IGN

OR

E r

efs

to

re

lative

ro

bu

stn

ess o

f h

ab

ita

t

1

AC

CE

PT

‘ty

pe

s o

f b

utt

erf

ly’ a

s A

W f

or

sp

ecie

s

IG

NO

RE

‘ind

ivid

ua

ls’ o

r ‘o

rga

nis

ms’

2

DO

NO

T C

RE

DIT

re

f to

‘p

lan

nin

g’ a

lon

e (

as g

ive

n in

qu

estio

n)

2 I

GN

OR

E r

esp

on

se

s t

ha

t im

ply

un

ce

rta

inty

ab

ou

t th

e

de

ve

lop

me

nt.

e

.g.

‘co

uld

’ ‘m

igh

t’ ‘m

ay’

18

Page 21: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

F2

12

Ma

rk S

ch

em

e

Ju

ne

20

10

19

Qu

es

tio

nE

xp

ec

ted

An

sw

er

Ma

rkA

dd

itio

na

l G

uid

an

ce

6(c

)(i

)

sp

ecie

s

lett

er

Gra

ylin

g

(Hip

pa

rch

ia s

em

ele

) A

;

La

rge

He

ath

(C

oe

no

nym

ph

a t

ulli

a)

D ;

Ga

teke

ep

er

(Pyro

nia

tyth

on

us)

F ;

Gre

en

Ha

irstr

ea

k

(Ca

llop

hry

s r

ub

i)

B ;

Silv

er-

stu

dd

ed

Blu

e

(Ple

be

ius a

rgu

s)

C ;

Sm

all

He

ath

(C

oe

no

nym

ph

a p

ha

mh

ylu

s)

E

5

DO

NO

T C

RE

DIT

if

mo

re t

ha

n o

ne

le

tte

r g

ive

n a

ga

inst

an

y in

div

idu

al sp

ecie

s

6(c

)(i

i) 1 2 3

(is)

sa

me

ge

nu

s ;

h

ave

, fe

atu

res

/ ch

ara

cte

ristics /

app

ea

ran

ce

/ b

eh

avio

ur

/

bio

ch

em

istr

y /

ph

ysio

log

y /

an

ato

my /

ge

ne

s /

ge

ne

tic m

ake

up /

DN

A,

th

at

are

, sim

ilar

/ in

co

mm

on

;

(sh

are

a)

com

mo

n,

an

ce

sto

r /

ph

ylo

ge

ny ;

2 m

ax

1D

O N

OT

CR

ED

IT v

ag

ue

sta

tem

en

ts lik

e ‘co

uld

be

in t

he

sa

me

ge

nu

s’

IGN

OR

EC

oe

no

nym

ph

a

2IG

NO

RE

‘sim

ilar’

on

its

ow

n

D

O N

OT

CR

ED

IT ‘sa

me

IGN

OR

E s

pe

cific

exa

mp

les

(e.g

. o

ran

ge

win

gs /

la

rge

sp

ot)

3A

CC

EP

T c

lose

ly r

ela

ted

;

T

ota

l1

8

Page 22: OCR F212 Molecules, Biodiversity, Food and Health June 2010 Mark Scheme

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