Bacterial Growth and Metabolism MCQs

1) What is the initial phase of bacterial growth (on the bacterial growth curve) called?

a) Decline

b) Stationary phase

c) Log phase

d) Exponential phase

2) Clostridium perfringens cannot grow with oxygen present and thus is a(n) ____ while

Mycobacterium tuberculosis requires oxygen and thus is a(n) ____.

a) Obligate anaerobe; Obligate aerobe

b) Obligate aerobe; Obligate anaerobe

c) Obligate anaerobe; Obligate anaerobe

d) Obligate aerobe; Obligate aerobe

e) Facultative anaerobe; Facultative anaerobe

3) At the onset of bacterial transcription, what allows for the recognition of a particular

sequence of nucleotides in the DNA (promoter)? Some bacteria encode several of these

to allow transcription of a group of genes under special conditions, such as heat shock,

starvation, special nitrogen metabolism, or sporulation.

a) Operon

b) Epsilon factor

c) Alpha factor

d) Sigma factor

e) Delta factor

4) Which of the following best describes the function of fMet-tRNA?

a) Protein folding into the tertiary structure

b) Initiating transcription allowing for RNA copying

c) Attaching to P-site during translation allowing for 70S assembly

d) Attaching to A-site during translation allowing for 30S binding

e) Attaching to the stop codon during translation to release the protein