Question

Why is an enzyme in a chemical reaction like a lock and key?

A) Enzymes and locks both require specific shapes to function properly.
B) Enzymes and keys both undergo a chemical reaction when they interact.
C) Enzymes and locks both have a specific binding site for interaction.
D) Enzymes and keys both require energy to initiate a reaction.

Answer 1

The lock-and-key model of enzyme action explains how enzymes and substrates fit together perfectly, like a key in a lock, due to their complementary shapes. Enzymes are highly efficient catalysts due to their specific shapes and selective affinity for substrates.

Step-by-step explanation:

The lock-and-key model of enzyme action suggests that the shape of the enzyme's active site is complementary to the shape of its substrate, just like a key fits into a lock. This means that the enzyme and substrate fit together perfectly, allowing the enzyme to perform its catalytic function for a specific reaction.

Unlike inorganic catalysts, enzymes have specific shapes and bonding groups that attract only the necessary substrates for a particular reaction. The affinity between the enzyme's active site and the substrate is highly selective, resulting in more efficient and faster reactions. The lock-and-key model explains the specificity of enzyme-substrate interactions.