2009 Senior External Examination in Biology: Paper … · 2009 Senior External Examination Biology Paper One — Question and response book ... Question 3 In an experiment,

© The State of Queensland (Queensland Studies Authority) 2009

2009 Senior External Examination

BiologyPaper One — Question and response book

Tuesday 3 November 2009

9:00 am to 11:40 am

Time allowed

• Perusal time: 10 minutes• Working time: 2 hours 30 minutes

Examination materials provided

• Paper One – Question and response book

• Paper One Part A – Multiple-choice response sheet

• Notepaper

Equipment allowed

• QSA-approved equipment

• non-programmable calculator

Directions

Do not write in this book during perusal time.

Paper One has three parts:

• Part A: Multiple choice

• Part B: Short response

• Part C: Extended response

Attempt all questions.

Suggested time allocation

• Part A: 1 hour

• Part B: 40 minutes

• Part C: 50 minutes

Assessment

Assessment standards are at the end of this book.

After the examination

The supervisor will collect this book when you leave the examination room.

Supervisor use only

QSA use only

Supervisor’s initials

Marker number

––

Candidate use

Print your candidate number here

Attach barcode here

Number of books used

0 9

Planning space

Part A

Multiple choice

Suggested time allocation: 1 hour.This part has 20 questions of equal value. Attempt all questions.

Part A assesses Understanding Biology (UB).

Each question has four options, one of which is correct or is the best option. Respond to each question by selecting one of the four possible options and blackening the appropriate circle on the multiple-choice response sheet provided. Use a 2B pencil to blacken the circles.

No credit for your response will be given if more than one circle is blackened.

Question 1

The process by which a substance spreads from a region of high concentration to a region of low concentration is known as

Question 2

Which of the following organelles is more numerous in a muscle cell than in a bone cell?

Question 3

A student made a wet mount of a letter of the alphabet. Under the microscope on low power, it looked like “d”. What was the actual letter she made the slide of?

A osmosis.

B diffusion.

C pinocytosis.

D active transport.

A centriole

B ribosome

C lysosome

D mitochondria

A b

B d

C p

D q

2009 Biology — Paper One — Question and response book 1

T:\exexams\2009\Papers\Subjects\Biology\P1\09_Biology_P1_Question and Response.fm August 17, 2009 2:59 pm

Question 4

The process of digestion can best be described as the

Question 5

A dish was filled with agar containing starch. In turn, five cavities are cut into the surface of the agar. Each cavity is then filled with a different liquid, then warmed and then flooded with iodine. The results are shown below.

What do the results suggest about the action of saliva on starch?

A release of energy from food.

B breakdown of organic molecules.

C breakdown of food in the stomach.

D splitting of bonds that bind nutrients together.

A The saliva has no affect on starch.

B Saliva only reacts with iodine, not starch.

C Boiled saliva and saliva treated with acids break down the starch.

D Saliva breaks down starch so it no longer tests positive with iodine.

Agar jelly and starchAgar jelly and starchAgar jelly and starch

Blue-black area afteriodine treatment

Clear areas after iodinetreatment

Distilledwater

Untreatedsaliva

Boiledsaliva

Saliva plusweak acid

Juice extractedfrom wheat

2 2009 Biology — Paper One — Question and response book


Question 6

The diagram below refers to the female reproductive system.

The structure labelled X is the

Question 7

When blood sugar level falls, a hormone is secreted from an endocrine gland. The blood sugar level then returns to its normal level. With reference to this description, which of the following is the correct sequence?

A uterus.

B cervix.

C vagina.

D fallopian tube.

A stimulus, effector, control centre, response, receptor

B stimulus, receptor, control centre, effector, response

C stimulus, receptor, control centre, response, effector

D stimulus, effector, receptor, control centre, response

X



Question 8

Which of the following is formed during fertilisation from the fusion of two gametes?

Question 9

Which of the following graphs best represents the level of glucose in the bloodstream after a large carbohydrate meal?

A a clone

B a foetus

C a zygote

D an embryo

A B

C D

Concentration ofblood glucose

Time after meal


Time after meal


Time after meal


Time after meal



Question 10

When a large number of bacteria are placed on a medium that contains streptomycin, most of the bacteria die. Those that survive are then placed on a second dish that contains the same amount of streptomycin. Now most bacteria survive. Why do they survive?

Question 11

Charles Darwin proposed a theory known as natural selection which explains how evolution occurred. This theory is based on the idea that

Question 12

Alternative forms of a gene are

A They could not produce antibodies.

B They have a natural resistance to the streptomycin.

C They were able to build up a natural immunity to the streptomycin.

D They did not come into contact with enough streptomycin to kill them.

A favourable variations gradually become more common in the population.

B individual organisms acquire favourable characteristics.

C asexual reproduction causes variation.

D all variations are favourable.

A alleles.

B chromatids.

C karyotypes.

D chromosomes.



Questions 13 and 14 refer to the following pedigree showing the inheritance of haemophilia.

Question 13

What is the chance of female 5 being a carrier?

Question 14

Female 3 is a carrier. If she decides to have a child with an unaffected male, what is the chance of her child being a haemophiliac?

Question 15

Which of the following is an example of a variable?

A 0%

B 25%

C 50%

D 100%

A 0%

B 25%

C 50%

D 100%

A the mass of a particular piece of filter paper

B leaving a plant in the sun for two hours

C the temperature during a particular day

D a particular person’s date of birth

1

3 4 5 6

2



Question 16

Refer to the table below.

In which country was the rate of population growth the greatest?

Question 17

RNA does not contain which of the following molecules?

Question 18

Which of the following organisms has the greatest biomass in a particular community?

Country Birth rate(per thousand of population)

Death rate(per thousand of population)

Country 1 14.0 14.3

Country 2 44.0 11.0

Country 3 50.0 20.0

Country 4 42.0 17.0

A Country 1

B Country 2

C Country 3

D Country 4

A uracil

B guanine

C thymine

D cytosine

A predators

B producers

C herbivores

D third-order consumers



Question 19

The following diagram represents aspects of the carbon cycle.

The three missing processes (in order X, Y, Z) are

Question 20

Densely packed organisms are living in one small area. They are most likely to compete if they belong to one species rather than if they belong to many different species. The most likely reason for this is that organisms of the same species

End of Part A

A photosynthesis, combustion, respiration

B photosynthesis, respiration, decay

C decay, photosynthesis, respiration

D respiration, decay, combustion

A have similar death rates.

B can produce more fertile offspring.

C have similar biological requirements.

D are less likely to move out of the area.



Part B

Short response

Suggested time allocation: 40 minutes.

This part has five questions of equal value. Attempt all questions.

Part B assesses Investigating Biology (IB).

Respond to the questions in the spaces provided.

Question 1

A researcher was testing the hypothesis that the range of sound frequencies that a person can hear decreases as they age. Males and females of differing ages were selected. A sound generator produced noises that varied in frequency. State the dependent variable in this experiment.

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Question 2

Vitamin C is believed to prevent colds. To test this, 10000 volunteers were divided into four equal groups. Each person received a dose every evening for one year. The results were as follows:

State which group (1, 2, 3 or 4) is the control group. Justify your response.

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Question 3

In an experiment, the following trials were set up.

Both jars are kept in the dark. State the most probable hypothesis being tested.

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Group Contents of dose Percentagewho developed colds

1 Sugar 20

2 Sugar + 1 gram of Vitamin C 19

3 Sugar + 3 grams of Vitamin C 21

4 Sugar + 9 grams of Vitamin C 10

Trial 1 Trial 2sealed jars

green plant

CO removed2

O removed2

chemical thatchanges colourin the presence

of CO2



Question 4

A student performed an experiment in which yeast cells were placed in differing concentrations of glucose. The growth of yeast was measured.

In the space below, sketch and label the axes that would be used to most appropriately display the results.

Question 5

A guide to whether an individual is overweight is calculated using the body mass index (BMI). This is calculated in the following way:

The table below shows weight categories.

A 1.57 m woman weighing 63 kg would be in which category?

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End of Part B

Category BMI (Female)

Underweight 19.9 or less

Acceptable weight 20–25

Overweight 25.1–30

Obese 30.1–40

Extreme obesity 40.1 or more

BMImass kg

height m x height m ---------------------------------------------------------------- =



Part C

Extended response

Suggested time allocation: 50 minutes.

This part has two questions of equal value. Attempt both questions.

Part C assesses Evaluating Biological Issues (EBI).

Write an extended response to each of the questions on the following pages.

Each response must refer to biological principles, concepts and ideas.Plan your responses carefully. If you do a first draft and then a final draft, indicate which is the draft to be assessed.

Additional lined pages for responses, if required, are on pages 15–17. If you use the additional pages, label the question you are responding to in the box provided on each page.

Question 1

Stem cells are generally thought to be able to develop into many different cell types in the body. When a stem cell divides, each new cell has the potential to either remain a stem cell or become another type of cell with a more specialised function, such as a muscle cell, a red blood cell or a brain cell. Cancerous cells are those which display some form of uncontrolled growth. Occasionally, embryonic stem cells injected into patients can cause disabling if not deadly tumours. Justify the ongoing proposed use of stem cell therapy to treat patients with life-threatening conditions by critically evaluating the benefits and risks involved.

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Question 2

Organ transplantation is the replacement of body tissues. Discuss the positive and negative aspects of organ transplants. Predict the possible future directions for research.

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End of Part C

End of Paper One



Additional pages for responses (if required)

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Part C Question



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Part C Question



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Documents

2009 Senior External Examination in Biology: Paper … · 2009 Senior External Examination Biology Paper One — Question and response book ... Question 3 In an experiment,