Multiple Choice
In aerobic cellular respiration, pyruvate molecules must be transformed through a process called pyruvate oxidation before they can be broken down in the Krebs Cycle. What are the products of pyruvate oxidation?
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24. Metabolism and Nutrition
Cellular Respiration: Pyruvate Oxidation
Multiple Choice
Each of the following describes the pyruvate oxidation reaction except that _____________________.
A
It connects glycolysis to the citric acid cycle.
B
Each pyruvate is converted to an acetyl-CoA molecule.
C
NAD+ is reduced to NADH.
D
This reaction occurs within the cytoplasm.
E
Carbon dioxide is released as a by-product.
Verified step by step guidance1
Understand the context of pyruvate oxidation: Pyruvate oxidation is a crucial step in cellular respiration that links glycolysis to the citric acid cycle.
Identify the location of pyruvate oxidation: Pyruvate oxidation occurs in the mitochondria, not in the cytoplasm. This is a key point to remember.
Review the conversion process: Each pyruvate molecule is converted into an acetyl-CoA molecule, which is then used in the citric acid cycle.
Examine the role of NAD+: During pyruvate oxidation, NAD+ is reduced to NADH, which is an important electron carrier in cellular respiration.
Consider the by-products: Carbon dioxide is released as a by-product of pyruvate oxidation, which is a common feature of decarboxylation reactions in metabolism.
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