Multiple Choice
Which molecule is the final electron acceptor in the electron transport chain?
6. Chemical Quantities & Aqueous Reactions
Redox Reactions
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In redox reactions, what role does NAD+ play?
A
NAD+ acts as a catalyst, speeding up the reaction without being consumed.
B
NAD+ acts as a buffer, maintaining pH levels during the reaction.
C
NAD+ acts as a reducing agent, donating electrons.
D
NAD+ acts as an oxidizing agent, accepting electrons.
Verified step by step guidance1
Understand the role of NAD+ in redox reactions: NAD+ is a coenzyme that plays a crucial role in cellular respiration and other metabolic processes.
Recognize that in redox reactions, there are two main components: the oxidizing agent and the reducing agent. The oxidizing agent gains electrons, while the reducing agent loses electrons.
Identify that NAD+ functions as an oxidizing agent. This means it accepts electrons from other molecules during the reaction.
When NAD+ accepts electrons, it is reduced to NADH. This is a key part of its role in energy metabolism, as NADH can later donate these electrons in other reactions.
Clarify that NAD+ does not act as a catalyst or a buffer in these reactions. Its primary function is to facilitate the transfer of electrons by acting as an oxidizing agent.
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