GROWTH AND NUTRITION OF BACTERIA QUESTIONS

46.

Bacteria of genus Nitrosomonas use __________ as their electron source.
A.     ammonia    B.     H2S
C.     succinate    D.     light
Answer & Explanation

Answer: Option A

Explanation:

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47.

All organisms require at least small amounts of carbondioxide, However, some can use CO2 as their sole source of carbon. Such organisms are termed as
A.     autotrophs    B.     phototrophs
C.     chemotrophs    D.     photo-organotrophs
Answer & Explanation

Answer: Option A

Explanation:

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48.

The generation time of a culture that produces two generations per hour is
A.     greater than that produces three generations per hour
B.     lesser than that produces three generations per hour
C.     equal to that produces three generations per hour
D.     none of the above
Answer & Explanation

Answer: Option A

Explanation:

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49.

Autotrophic bacteria are those which
A.     make their own food
B.     form a long chain glycocalyx
C.     are highly susceptible to penicillin
D.     produce a blue-green pigment
Answer & Explanation

Answer: Option A

Explanation:

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50.

Which of the following organisms typically get their carbon for biosynthesis from organic compounds?
A.     Aerobic, glucose-respiring bacteria (aerobic respiration)
B.     Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
C.     Photosynthetic cyanobacteria (phototrophic metabolism)
D.     None of the above
Answer & Explanation

Answer: Option A

Explanation:

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