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Which outcome occurs when the rate constant exceeds diffusion limit in enzyme catalysis within a cell?

A)Enzyme conformational change propagation
B)Substrate accumulation near active site
C)Reduced product formation maximum rate
D)Increased un-catalyzed side reactions

💡 Explanation

When the rate constant exceeds the diffusion limit, substrate molecules cannot reach the enzyme's active site quickly enough because substrate diffusion becomes rate-limiting, leading to substrate accumulation. Therefore, substrate accumulation results, rather than conformational change, reduced product formation or side reactions that require sufficient substrate encounter at the active site.

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