Chapters Three and Four Quiz Questions

Question 1

Which of the following is NOT commonly found within the cytoplasm of a prokaryotic cell?
Inclusion bodies
80S ribosome
Polyribosomes
Regulatory proteins
Enzymes

Answer 1

80S ribosome

Question 2

Which of the following would you expect to find within cyanobacteria, allowing them to capture light energy?

Carboxysomes
Chloroplasts
Capsules
Thylakoids
Magnetosomes

Answer 2

Thylakoids

Question 3

Some bacteria have extrachromosomal genetic elements that carry non-crucial genes. These elements are called:

Answer 3

Plasmids

Question 4

Bacterial growth refers to:

Answer 4

An increase in the number of cells.

Question 5

Which of the following would be used to only count living cells and NOT dead cells?
Turbidity
Spread plate
Direct microscope count
Weighing

Answer 5

Spread plate

Question 6

Which of the following would be used to only count living cells and NOT dead cells?

Answer 6

Stationary phase

Question 7

If you begin with 8 Staphylococcus epidermidis cells with a generation time of 40 minutes, how many will you have after 2 hours of exponential growth?

Answer 7

64

Question 8

If 25 cells growing for 10 hours produced 5,000,000 cells, how long is the generation time for this population?

Answer 8

34 minutes

Question 9

Which of the following is NOT true?

Piezophiles require high pressure to grow

A chemostat may be used to keep a culture in the logarithmic phase of growth

The faster a cell grows, the larger the cell becomes (to a point)

Microbes that grow at high temperatures may use negatively supercoiled DNA to stabilize the double helix

Microbes that grow well at 5 degrees C are called psychrophiles

Answer 9

Microbes that grow at high temperatures may use negatively supercoiled DNA to stabilize the double helix

Question 10

Microbes that live with very high solute concentrations are called

Answer 10

Halophiles