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. autotrophs

C. prototrophs

D. chemotrophs

Question #2

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

A. barophile

B. osmotolerant

C. acidophile

D. halophile

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 is an obligate anaerobe.

B. organism is killed by oxygen

C. organism should be grown in an anaerobic chamber

D. organism are aerobes

Question #4

Generation time is:

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

B. the same for all microorganisms

C. time required for the initial adjustment

D. time required for the population to double

Question #5

In the exponential phase, the cells and cell mass:

A. decreases

B. first increases then decreases

C. double at a constant rate

D. are constant