Question

The "lock-and-key" model of enzyme action illustrates that a particular enzyme molecules 1) forms a permanent enzyme-substrate complex 2) may be destroyed and resynthesized several times 3) interacts with a specific type of substrate molecule 4) reacts at identical rates under all conditions

Answer 1

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The "lock-and-key" model of enzyme action illustrates that a particular enzyme molecule:

1) Forms a temporary, specific binding site for a substrate molecule, which fits into the active site like a key into a lock.

2) May be altered or destroyed by changes in pH, temperature, or other environmental factors.

3) Interacts with a specific type of substrate molecule, which fits into the active site like a key into a lock.

4) Reacts at different rates depending on the environmental conditions, such as pH, temperature, and substrate concentration.