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Multiple Choice
In glycolysis, which molecule acts as the primary electron acceptor?
A
FAD
B
NAD+
C
ADP
D
ATP
Verified step by step guidance
1
Understand the context of glycolysis: Glycolysis is a metabolic pathway that converts glucose into pyruvate, releasing energy and reducing equivalents in the form of NADH.
Identify the role of electron acceptors: In biochemical reactions, electron acceptors are molecules that receive electrons during the oxidation of substrates.
Recognize the primary electron acceptor in glycolysis: During glycolysis, NAD+ acts as the primary electron acceptor, becoming reduced to NADH as it accepts electrons.
Differentiate between NAD+ and other molecules: FAD, ADP, and ATP have different roles in cellular metabolism. FAD is involved in other pathways like the citric acid cycle, while ADP and ATP are related to energy transfer rather than electron acceptance.
Conclude the identification: Based on the role of NAD+ in glycolysis, it is the correct answer as the primary electron acceptor, facilitating the conversion of glucose to pyruvate.