Explain the 'induced fit' model of enzyme-substrate interaction.

Induced fit is when the active site of an enzyme changes its shape to perfectly bind to the substrate, creating an enzyme-substrate hug.

What happens to an enzyme after it catalyzes a reaction?

The enzyme is not used up in the reaction and can be used again to catalyze another reaction.

Grade 7th Grade · Science · 60 min· Openscied

I can describe how chemical reactions break down and build up molecules in living things.

Amoeba Sisters · 5:47

Enzymes (Updated)

3 key concepts

1
Enzymes are mostly proteins that speed up reactions by binding to substrates at the enzyme's active site.
2
Enzymes are considered catalysts because they are not used up in a reaction and can be used over and over.
3
If the pH or temperature is not ideal, an enzyme can become denatured, which means it loses its shape and can no longer function.

12 questions · Multiple choice & Short answer

Quick comprehension check

“Explain how the enzyme lactase breaks down lactose. What happens to people who do not produce enough lactase?”

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