Question

Cultures of a bacterial species were incubated in a standard incubator, in an anaerobic jar, and in a candle jar. After incubation, there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture in the incubator. This species is a/n:_______
a. aerobe
b. anaerobe
c. facultative anaerobe
d. microaerophile
e. capnophile

Answer 1

Answer:

c. facultative anaerobe

Explanation:

• Facultative anaerobe is an organism that is able to live both in the presence and in absence of oxygen. If oxygen is present then the organism uses respiration however if it is absent it can switch to fermentation.
• In the given question it has been given that the organism is able to grow in an anaerobic jar as well as in the incubator, however the growth is higher in incubator, this indicates that the organism is not a strict aerobe (oxygen requiring) or a strict anaerobe (does not require oxygen). Therefore, the bacterial species mentioned in the question must be a facultative anaerobe.