Under ideal conditions, the fermentation of one glucose molecule by a bacterium allows a net gain of how many ATP molecules?
a. 2
b. 4
c. 38
d. 0

검증된 단계별 안내

Understand that fermentation is an anaerobic process where glucose is broken down to produce energy without the use of oxygen.

Recall that during fermentation, glucose undergoes glycolysis, which converts one molecule of glucose into two molecules of pyruvate, producing ATP and NADH in the process.

Note that glycolysis produces a net gain of 2 ATP molecules per glucose molecule because 4 ATP are produced but 2 ATP are used during the initial steps.

Recognize that fermentation itself does not produce additional ATP beyond glycolysis; it mainly regenerates NAD+ to allow glycolysis to continue.

Therefore, the net ATP gain from fermentation of one glucose molecule is the ATP produced during glycolysis, which is 2 ATP molecules.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Fermentation Process

Fermentation is an anaerobic metabolic process where bacteria convert glucose into energy and byproducts like acids or alcohol. It occurs without oxygen and allows cells to regenerate NAD+ for glycolysis to continue, but it produces less ATP compared to aerobic respiration.

ATP Yield in Fermentation

During fermentation, the net ATP gain per glucose molecule is limited because only glycolysis produces ATP. Typically, fermentation yields a net gain of 2 ATP molecules per glucose, as no additional ATP is generated beyond glycolysis.

Comparison with Aerobic Respiration

Aerobic respiration fully oxidizes glucose using oxygen, producing up to 38 ATP molecules per glucose. In contrast, fermentation is less efficient, yielding only 2 ATP, highlighting the energy trade-off in anaerobic conditions.

Under ideal conditions, the fermentation of one glucose molecule by a bacterium allows a net gain of how many ATP molecules?a. 2b. 4c. 38d. 0