Microbial Metabolism for Competitive Exam Preparation

Microbial Metabolism

Q. What is the end product of lactic acid fermentation?

Solution

Lactic acid fermentation results in the production of lactic acid.

Correct Answer: B — Lactic acid

Q. What is the main purpose of the pentose phosphate pathway in bacteria?

Solution

The pentose phosphate pathway primarily generates NADPH for biosynthetic reactions.

Correct Answer: B — NADPH production

Q. What is the primary energy source for most bacteria during anaerobic respiration?

Solution

Many bacteria use nitrate as a terminal electron acceptor in anaerobic respiration.

Correct Answer: C — Nitrate

Q. What is the primary function of fermentation in microbial metabolism?

Solution

Fermentation primarily serves to regenerate NAD+ to allow glycolysis to continue.

Correct Answer: B — Regeneration of NAD+

Q. What type of metabolism do bacteria that can use sulfur compounds for energy exhibit?

Solution

Chemolithotrophy is the metabolism used by bacteria that oxidize inorganic sulfur compounds for energy.

Correct Answer: C — Chemolithotrophy

Q. Which enzyme is crucial for the conversion of pyruvate to acetyl-CoA?

Solution

Pyruvate dehydrogenase is the enzyme that converts pyruvate to acetyl-CoA.

Correct Answer: C — Pyruvate dehydrogenase

Q. Which metabolic pathway is primarily used by bacteria to ferment glucose?

Solution

Glycolysis is the primary pathway for glucose fermentation in bacteria.

Correct Answer: B — Glycolysis

Q. Which of the following is NOT a terminal electron acceptor in anaerobic respiration?

Solution

Oxygen is not used as a terminal electron acceptor in anaerobic respiration.

Correct Answer: C — Oxygen

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