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Which distinguishes induced fit from a rigid lock-and-key model?

Only induced fit involves a substrate-binding active site.Binding can change the enzyme's conformation.The active site remains rigid throughout substrate binding.

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A high-temperature rate falls. Which explanation is appropriate?

All particles must now be moving more slowly.Every peptide bond necessarily hydrolyses.Active-site conformation can be disrupted, reducing productive complexes.

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What would usually raise the high-substrate plateau while keeping conditions suitable?

Adding more active enzyme.Adding substrate indefinitely to the same saturated enzyme amount.Diluting the enzyme while keeping substrate saturating.

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Which improvement directly addresses coarse amylase endpoint timing?

Repeat the same coarse sampling schedule without shortening intervals.Use shorter, consistent sampling intervals near the endpoint.Use longer sampling intervals so the colour difference is easier to see.

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Question 1 of 4

Explain catalysis

Explain enzyme specificity and catalysis using active site, enzyme-substrate complex, induced fit and activation energy.

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wise otter / H1 BiologyOfficial 2027 syllabus