Upload
thomasine-ray
View
213
Download
0
Embed Size (px)
Citation preview
On what basis have bacteria traditionally been classified?
1. Shape of colony2. Size of colony3. Gram stain4. All of the above
Shape of c
olony
0% 0%0%0%
Gram-positive bacteria
appear purp
le after Gra
...
frequently
cause
disease
...
have a thick
er lay
er of p
...
All of t
he above are tr
ue
0% 0%0%0%
1. appear purple after Gram staining
2. frequently cause diseases that cannot be cured by antibiotics
3. have a thicker layer of peptidoglycan
4. All of the above are true
Gram positive bacteria differ from Gram-negative bacteria in
1. their response to the Gram stain
2. their susceptibility to antibiotics
3. the make up of their cell walls
4. All of the above
their r
esponse
to th
e G...
0% 0%0%0%
One structure you would NOT find in a bacteria cell is a
cell w
all
Cell membra
ne
Mito
chondria
chro
mosome
0% 0%0%0%
1. cell wall 2. Cell membrane3. Mitochondria4. chromosome
Bacteria cells have
a cell w
all only
a cell m
embrane only
both a
cell m
embrane a..
a cell w
all insid
e of their.
..
0% 0%0%0%
1. a cell wall only2. a cell membrane
only3. both a cell
membrane and an outer wall
4. a cell wall inside of their cell membrane
The most commonly encountered bacteria are roughly spherical. The microbiological term describing this
shape is
Coccus
Bacillu
s
spiril
la
0% 0%0%
1. Coccus2. Bacillus3. spirilla
Another common bacterial shape is that of a rod, often called
Coccus
Bacillu
s
spiril
la
0% 0%0%
1. Coccus2. Bacillus3. spirilla
In bacterial cells, ribosomes are packed into the cytoplasmic matrix and also loosely attached to the plasma membrane. What is the function of
ribosomes?
Site
of energ
y...
Site
of pro
tei...
Contains t
he g...
Lets
things
in...
0% 0%0%0%
1. Site of energy production
2. Site of protein synthesis
3. Contains the genetic material
4. Lets things in and out of the cell
Which of the following statements regarding bacterial DNA is true
Bacte
ria only ...
It is
a single...
It co
ntains h
i...
It is
only sin...
0% 0%0%0%
1. Bacteria only possess 4 chromosomes
2. It is a single circular loop
3. It contains histone proteins
4. It is only single stranded
Petri dishes are incubated in an inverted position in order to prevent
condense
d mois.
..
The agar f
rom ...
the co
lonies f...
The bacteria
f...
0% 0%0%0%
a. condensed moisture from dropping onto the colonies, thus contaminating them directly.
b. The agar from drying out.c. the colonies from sinking
into the medium.d. The bacteria from over-
heating.
Cloudiness is a sign that bacteria have grown in a _______________ after
inoculation and incubation.
streak plate
tube of n
utrie...
Gram
stain
Simple st
ain
0% 0%0%0%
1. streak plate2. tube of nutrient
broth3. Gram stain4. Simple stain
The optimum temperature for incubating an organism is the one at which
it gro
ws with
...
it has t
he lon...
it is
near one...
its enzy
mes be...
0% 0%0%0%
1. it grows with the shortest generation time
2. it has the longest time between cell divisions
3. it is near one extreme of its range of tolerated temperatures
4. its enzymes begin to denature
The stage of bacteria growth where death and growth are equal
Lag
Log
Stationary
death
0% 0%0%0%
1. Lag2. Log3. Stationary4. death
E.Coli bacteria are
Gram
-nega
tive ...
Gram
negative
...
Gram
positive ...
Gram
positive ...
0% 0%0%0%
1. Gram-negative cocci2. Gram negative
baccili3. Gram positive cocci4. Gram positive baccili
The process in which the chromosomes of a bacteria replicates and the cell divides is called
Transducti
on
Binary fissi
on
Conjugation
Meiosis
0% 0%0%0%
1. Transduction2. Binary fission3. Conjugation4. Meiosis
Prokaryotes are unlike all other organisms in that their cells
Lack
nuclei
Have
cell w
alls
Have
organelle
s
Lack
nucleic
acids
0% 0%0%0%
1. Lack nuclei2. Have cell walls3. Have organelles4. Lack nucleic acids
Which statement is true about bacteria?
Bacte
ria are
living orga
n...
Bacte
ria are
the sm
allest
..
Bacte
ria are
the oldest
...
All thre
e state
ments are
...
0% 0%0%0%
1. Bacteria are living organisms that consist of one cell.
2. Bacteria are the smallest of all living things.
3. Bacteria are the oldest and most diverse life forms.
4. All three statements are true.
There are three common shapes of bacteria. They are
rods,
sphere
s, and sp
irals.
rods,
spira
ls, and tu
bes.
sphere
s, hexa
gons, and ...
none of the above.
0% 0%0%0%
1. rods, spheres, and spirals.
2. rods, spirals, and tubes.3. spheres, hexagons, and
spirals.4. none of the above.
What has caused some bacteria to become drug-resistant?
the m
isuse
of antibiotics
..
that 5
0 percent o
f all a
nt...
both 1 and 2
none of the above
0% 0%0%0%
1. the misuse of antibiotics to try and cure viral infections like the common cold
2. that 50 percent of all antibiotics end up in animal feed, creating super bacteria
3. both 1 and 24. none of the above
When streaking a plate, the loop should be flamed
At the beginning and end
At the beginning and e..
At the beginning and e..
At the beginning and e..
0% 0%0%0%
1. At the beginning and end 2. At the beginning and end
and between the first 2 quadrants
3. At the beginning and end and between the second and third quadrants
4. At the beginning and end and between each quadrant