Question

Which statement describes glycolysis?

A) It occurs in the mitochondria
B) It is an anabolic process
C) It involves the breakdown of glucose
D) It produces a net gain of ATP in the absence of oxygen

Answer 1

Glycolysis is an anaerobic process that involves the breakdown of glucose in the cytoplasm, resulting in the production of ATP, pyruvate, and NADH.

Step-by-step explanation:

The statement that describes glycolysis is C) It involves the breakdown of glucose. Glycolysis is the first step in the metabolism of glucose and happens in the absence of oxygen, thus it is an anaerobic process. It takes place in the cytoplasm of both prokaryotic and eukaryotic cells. During glycolysis, one molecule of glucose breaks down into two molecules of pyruvate, resulting in a net gain of two ATP molecules. This is accomplished through a series of enzymatic reactions that transfer energy from glucose to form ATP and reduced electron carriers (NADH). Glycolysis can lead to further energy production through aerobic respiration if oxygen is present, involving the Krebs cycle and electron transport chain, or it can proceed under anaerobic conditions to produce a smaller amount of ATP.

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