Prince George Community College » Biology » Bio 2010 - Microbiology » Summer 2023

Question #1

Organisms which obtain their energy from chemicals are designated as:

A. organotrophs

B. prototrophs

C. chemotrophs

D. autotrophs

Question #2

An organism has an optimal growth rate when the hydrogen ion concentration is very high. This organism is:

A. halophile

B. barophile

C. acidophile

D. osmotolerant

Question #3

A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the

A. organism should be grown in an anaerobic chamber

B. organism are aerobes

C. organism is an obligate anaerobe.

D. organism is killed by oxygen

Question #4

Generation time is:

A. time required for the population to double

B. the same for all microorganisms

C. time required for the initial adjustment

D. the amount of time needed for the cell to get larger

Question #5

In the exponential phase, the cells and cell mass:

A. are constant

B. double at a constant rate

C. first increases then decreases

D. decreases