GROWTH AND NUTRITION OF BACTERIA QUESTIONS

11.

The total biomass of an organism will be determined by the nutrient present in the lowest concentration relative to the organism’s requirements is a statement of
A.     Liebig’s law of the minimum
B.     Shelford’s law of tolerance
C.     quorum sensing
D.     Heisenberg’s principle of uncertainty
Answer & Explanation

Answer: Option A

Explanation:

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12.

The growth is normally expressed as __________ in turbidimetric measurement
A.     cells per ml
B.     cfu/ml
C.     optical density
D.     mg N2 /ml
Answer & Explanation

Answer: Option C

Explanation:

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13.

Which of the following organisms typically get their carbon for biosynthesis from carbon dioxide?
A.     Glucose-fermenting bacteria (fermentation)
B.     Anaerobic, glucose-respiring bacteria (anaerobic respiration)
C.     Aerobic, glucose-respiring bacteria (aerobic respiration)
D.     Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
Answer & Explanation

Answer: Option D

Explanation:

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14.

An organism that expends energy to grow in a habitat with a low water activity in order to maintain internal solute concentrations to retain water is
A.     osmotolerant
B.     acidophile
C.     aerotolerant anaerobe
D.     alkalophile
Answer & Explanation

Answer: Option A

Explanation:

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15.

The straightforward method of binary fission explains how bacteria
A.     grow in nutrient agar
B.     evolve
C.     move
D.     reproduce
Answer & Explanation

Answer: Option D

Explanation:

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