BI-1274
Lock-and-key model
Biology · Secondary 4 · Medium · Lock-and-key model
A child has a mutation that changes one base in the mRNA for an enzyme that digests protein in the small intestine. As a result, the enzyme’s active site no longer fits the protein substrate.
Using the lock and key hypothesis, what will happen to the rate of protein digestion?
Using the lock and key hypothesis, what will happen to the rate of protein digestion?
- It decreases greatly because the substrate cannot bind to the active site.
- It increases because the enzyme becomes more reactive after mutation.
- It stays the same because enzymes are not affected by base changes.
- It decreases only at very high temperatures.
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