Enzymes Flashcards

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Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What are enzymes?

Enzymes are biological catalysts that increase the rate of chemical reactions in living organisms without being used up or altered.

What is the lock and key model of enzyme action?

The lock and key model suggests that the enzyme’s active site has a specific shape that fits the substrate exactly, like a key in a lock.

What is the induced fit model of enzyme action?

The induced fit model suggests that the enzyme’s active site changes shape slightly to fit the substrate perfectly when it binds.

How do enzymes affect metabolic reactions?

Enzymes speed up metabolic reactions, such as breaking down molecules, without being used up in the process.

What happens if the substrate doesn’t fit the enzyme’s active site?

If the substrate doesn’t fit the enzyme’s active site, the reaction will not be catalysed.

How do the lock and key model and induced fit model differ?

The lock and key model suggests a fixed active site shape, while the induced fit model suggests the active site can change shape to fit the substrate.

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