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Question

Which of the following is true about glycolysis?

A
Glycolysis takes place in the mitochondria.
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B
Glycolysis is the last step in aerobic respiration.
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C
One glucose molecule is broken down to 3 pyruvic acid molecules.
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D
Glycolysis is a anaerobic process.
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Solution

The correct option is D Glycolysis is a anaerobic process.
Glycolysis is the first step in both aerobic and anaerobic respiration. None of its steps involve the use of oxygen to form the end product - pyruvic acid. It takes place in the cytoplasm. 2 molecules of pyruvic acid are formed from one glucose molecule.
However, immediately upon completing glycolysis, the cell must continue respiration in either an aerobic or anaerobic direction; this choice is made based on the circumstances of the particular cell.

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