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

Question #1

Organisms which obtain their energy from chemicals are designated as:

A. autotrophs

B. chemotrophs

C. organotrophs

D. prototrophs

Question #2

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

A. acidophile

B. osmotolerant

C. barophile

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 killed by oxygen

B. organism should be grown in an anaerobic chamber

C. organism are aerobes

D. organism is an obligate anaerobe.

Question #4

Generation time is:

A. time required for the population to double

B. time required for the initial adjustment

C. the same for all microorganisms

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. decreases

C. first increases then decreases

D. double at a constant rate