LABORATORY REVIEW
CELL RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 NAD+, 2 pyruvate, and 2 ATP
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2 NADH, 2 pyruvate, and 2 ATP
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2 FADH2, 2 pyruvate, and 4 ATP
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6 CO2, 2 ATP, and 2 pyruvate
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Detailed explanation-1: -2 NADH, 2 pyruvate molecules, and 2 ATP. During glycolysis, 2 NAD+ are reduced into 2 NADH (each containing 2 high-energy electrons), 2 pyruvate molecules are produced which will be oxidized in the citric acid cycle, and 2 net ATP are produced for the cell to use.
Detailed explanation-2: -During glycolysis, glucose ultimately breaks down into pyruvate and energy; a total of 2 ATP is derived in the process (Glucose + 2 NAD+ + 2 ADP + 2 Pi–> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O).
Detailed explanation-3: -NADH produces the following amount of ATP: Glycolysis: By oxidative phosphorylation, 2 NADH generates 6 ATP. Reaction to Transition: 2 NADH generates 6 ATP.
Detailed explanation-4: -Glycolysis produces two pyruvate molecules, four ATPs (a net of two ATP), two NADH, and two H2O. Therefore, without the presence of oxygen, glycolysis is the only process that can occur, and only two ATP molecules may be produced for each glucose molecule.