Question Video: Describing the Lock and Key Theory of Enzyme Action

Which of the following best describes the lock and key theory of enzyme action? [A] The substrate is the “lock” into which the enzyme, or the “key,” fits. [B] The enzyme and substrate have identical shapes, like a “lock and key.” [C] Once the enzyme and substrate have joined, they are locked together and cannot be separated. [D] The enzyme is the “lock” into which the substrate, or the “key,” fits.

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SOLVED: The lock and key model and the induced fit model are two models of enzyme action explaining both the specificity and the catalytic activity of enzymes. Indicate whether each statement is

Explain the lock-and-key hypothesis of enzyme action.

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