Chapter 10 Quiz Questions

Question 1

Why does genetic variation matter to prokaryotic cells?

a) Allows some cells in a population to possibly survive adverse conditions

b) The possibility of a better tomorrow

c) Adaptation to changing environments

d) Allow some cells to be more likely to replicate than others

e) All of the answers are true

Answer 1

e) All of the answers are true

Question 2

Which of the following accurately describes a mutation?

a) Removing the flagella from a bacterial cell

b) Changes in DNA sequence

c) Changes in RNA sequence due to transcription error

d) Changes to protein structure due to high heat

e) Changes in bacterial cell walls due to exposure to penicillin

Answer 2

b) Changes in DNA sequence

Question 3

A mutant Escherichia coli strain that requires histidine (an amino acid) added to their growth medium to grow are called

a) autotrophs

b) auxotrophs

c) heterotrophs

d) prototrophs

Answer 3

b) auxotrophs

Question 4

You want to isolate an Escherichia coli strain that is resistant to the antibiotic ampicillin from a mixed culture containing both resistant and non-resistant strains. Which of the following methods would be the easiest to reach your goal?

a) Enrichment method

b) Transposon selection

c) Replica plating

d) Direct selection

Answer 4

d) Direct selection

Question 5

Which of the following accurately describes the use of CRISPR by prokaryotic cells?

a) Trick question, CRISPR was developed by humans for genome editing and has nothing to do with microbiology

b) Antibiotic competition

c) Metabolize rare molecules

d) Adaptive immune response

e) Transfer plasmids

Answer 5

d) Adaptive immune response

Question 6

Matching. Each answer will be used once.

1. Natural transformation
2. Artificial transformation
3. Generalized transduction
4. Specialized transduction
5. Gram-positive conjugation
6. Gram-negative conjugation

Answer 6

Question 7

True or false: Sources of epidemics may be tracked using genome sequences.

Answer 7

True