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A group of Biology students set up an experiment with three test tubes - VCE - SSCE Biology - Question 4 - 2020 - Paper 1
Question 4
A group of Biology students set up an experiment with three test tubes. Each test tube contained the same enzyme and was kept under the same experimental conditions.... show full transcript
Worked Solution & Example Answer:A group of Biology students set up an experiment with three test tubes - VCE - SSCE Biology - Question 4 - 2020 - Paper 1
Step 1
When comparing the final contents of Test tube 1, the concentration of product contained in the final contents of Test tube 3 will
Answer
The correct answer is D: be zero due to the presence of an irreversible inhibitor.
Explanation
In the experimental setup, Test tube 3 contains both Substrate A and Substrate B. If there is an irreversible inhibitor present that specifically acts on the enzyme, it will permanently bind to the enzyme’s active site, preventing any substrate from binding and thus halting any product formation. Therefore, even though both substrates are present, the irreversible nature of the inhibition ensures that no product can be formed in this setup.