Multiple Choice
Where does the first stage of aerobic cellular respiration take place within a cell?
a) Mitochondrial matrix.
b) Inner mitochondrial membrane.
c) Intermembrane space.
d) Cytoplasm.
8. Respiration
Glycolysis
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Which of the following is the process in which glucose is oxidized to generate two molecules of pyruvate and in which ATP and NADH are produced?
A
Chemiosmosis
B
Fermentation
C
The oxidation of pyruvate
D
The citric acid cycle
E
None of the listed responses is correct.
Verified step by step guidance1
Begin by identifying the process described in the problem: glucose is oxidized to generate two molecules of pyruvate, and ATP and NADH are produced. This process is known as glycolysis.
Understand that glycolysis is the first step in cellular respiration, occurring in the cytoplasm of the cell, where one molecule of glucose (C₆H₁₂O₆) is converted into two molecules of pyruvate (C₃H₄O₃).
During glycolysis, a net gain of 2 ATP molecules and 2 NADH molecules is achieved. ATP is produced through substrate-level phosphorylation, and NADH is generated through the reduction of NAD⁺.
Review the options provided: Chemiosmosis, Fermentation, The oxidation of pyruvate, and The citric acid cycle. None of these processes describe the conversion of glucose to pyruvate with the production of ATP and NADH, which is specific to glycolysis.
Conclude that the correct answer is not listed among the options, as glycolysis is the process that matches the description given in the problem.
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