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What is a cofactor in enzyme reactions?

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Question: What is a cofactor in enzyme reactions?

Options:

  1. A type of substrate
  2. A non-protein molecule that assists enzyme function
  3. An inhibitor of enzyme activity
  4. A product of the enzyme reaction

Correct Answer: A non-protein molecule that assists enzyme function

Solution: 

A cofactor is a non-protein molecule that assists enzymes in catalyzing reactions, often by stabilizing the enzyme-substrate complex.

What is a cofactor in enzyme reactions?

Practice Questions

Q1
What is a cofactor in enzyme reactions?
  1. A type of substrate
  2. A non-protein molecule that assists enzyme function
  3. An inhibitor of enzyme activity
  4. A product of the enzyme reaction

Questions & Step-by-Step Solutions

What is a cofactor in enzyme reactions?
  • Step 1: Understand that enzymes are proteins that help speed up chemical reactions in the body.
  • Step 2: Know that some enzymes need extra help to work properly.
  • Step 3: Learn that a cofactor is a non-protein molecule that provides this extra help.
  • Step 4: Realize that cofactors can help stabilize the enzyme and the molecule it works on (called the substrate).
  • Step 5: Remember that without cofactors, some enzymes might not work effectively.
  • Cofactor – A non-protein molecule that assists enzymes in catalyzing reactions.
  • Enzyme-Substrate Complex – The intermediate formed when an enzyme binds to its substrate.
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