Archives: Questions and Answers

If two cultures of Escherichia coli were growing in media of the same composition, with one exposed to air and one occurring anaerobically, which would have the larger biomass when growth ceased? Explain your answer.

Which statement regarding facultative anaerobes is true? a. They can survive in the presence or absence of oxygen. b. They require oxygen to survive. c. They require the absence of oxygen to survive. d. They cannot metabolize glucose. e. They require carbon dioxide to survive.

Yeast is a facultative anaerobe. What does that mean?

E.coli is present in the colon. Is the statement true or false?

Select the correct answer. The term facultative anaerobe refers to an organism that: A) uses oxygen or grows without oxygen. B) requires less oxygen than is present in air. C) prefers to grow without oxygen. D) is killed by oxygen.

What is the difference between obligate adaptations and facultative adaptations? Please give an example of the contrast.

Human beings depend on oxygen to sustain life. However, at the cellular level, muscle cells are A) aerobics B) strict anaerobes C) capable of alcoholic fermentation D) facultative anaerobes