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What role does NAD+ play in the TCA cycle?

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Question: What role does NAD+ play in the TCA cycle?

Options:

  1. It acts as a substrate
  2. It is a coenzyme that accepts electrons
  3. It is produced during the cycle
  4. It inhibits the cycle

Correct Answer: It is a coenzyme that accepts electrons

Solution: 

NAD+ acts as a coenzyme that accepts electrons during the oxidation reactions in the TCA cycle.

What role does NAD+ play in the TCA cycle?

Practice Questions

Q1
What role does NAD+ play in the TCA cycle?
  1. It acts as a substrate
  2. It is a coenzyme that accepts electrons
  3. It is produced during the cycle
  4. It inhibits the cycle

Questions & Step-by-Step Solutions

What role does NAD+ play in the TCA cycle?
  • Step 1: Understand that NAD+ is a molecule found in our cells.
  • Step 2: Learn that NAD+ is a coenzyme, which means it helps enzymes do their job.
  • Step 3: Know that the TCA cycle (also called the Krebs cycle) is a series of chemical reactions that help produce energy in our cells.
  • Step 4: Realize that during the TCA cycle, some molecules are oxidized, meaning they lose electrons.
  • Step 5: Understand that NAD+ accepts these lost electrons, turning into NADH.
  • Step 6: Recognize that NADH carries the electrons to another part of the cell to help make energy.
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