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Q
QuestionBiochemistry

"An enzyme can only bind one reactant at a time. True or False A. True B. False"
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Answer

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Step 1:
Let me solve this problem step by step:

Step 2:
: Understand the Concept of Enzyme Binding

- Enzymes are proteins that catalyze biochemical reactions - They have an active site where substrates (reactants) bind - The key consideration is how many reactants can bind simultaneously

Step 3:
: Analyze Enzyme-Substrate Interaction

- Most enzymes have a single active site - This means only one substrate molecule can bind at a time - The enzyme-substrate complex forms temporarily during the reaction - After catalyzing the reaction, the enzyme releases the product and can bind another substrate

Step 4:
: Evaluate the Statement

- The statement "An enzyme can only bind one reactant at a time" is scientifically accurate - This is a fundamental principle of enzyme kinetics known as the "lock and key" or "induced fit" model - The single active site restricts simultaneous binding of multiple reactants

Step 5:
: Select the Correct Answer

- The statement is TRUE - Therefore, the correct answer is: A. True

Final Answer

True The statement is correct because enzymes typically have a single active site that allows binding of only one substrate molecule at a time during a catalytic cycle.