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Multiple Choice
Which of the following is a product of the Krebs cycle?
A
Glucose
B
ATP
C
Pyruvate
D
NADH
Verified step by step guidance
1
Understand the Krebs cycle: The Krebs cycle, also known as the citric acid cycle, is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of ATP.
Identify the main products of the Krebs cycle: The primary products of the Krebs cycle include NADH, FADH2, ATP (or GTP), and carbon dioxide (CO2).
Differentiate between the options: Glucose is a substrate that is broken down during glycolysis before entering the Krebs cycle. Pyruvate is the end product of glycolysis and is converted into acetyl-CoA before entering the Krebs cycle.
Recognize the role of NADH: NADH is a key electron carrier produced in the Krebs cycle. It is used in the electron transport chain to generate ATP through oxidative phosphorylation.
Conclude with the correct product: Based on the understanding of the Krebs cycle, NADH is indeed a product of the Krebs cycle, while glucose and pyruvate are not products of this cycle.