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. chemotrophs

C. autotrophs

D. prototrophs

Question #2

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

A. osmotolerant

B. acidophile

C. halophile

D. barophile

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 are aerobes

B. organism is killed by oxygen

C. organism should be grown in an anaerobic chamber

D. organism is an obligate anaerobe.

Question #4

Generation time is:

A. time required for the population to double

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

C. time required for the initial adjustment

D. the same for all microorganisms

Question #5

In the exponential phase, the cells and cell mass:

A. first increases then decreases

B. double at a constant rate

C. are constant

D. decreases