Nine tubes, containing the same amount of enzyme and the same volume of solutions of different concentrations of substrate (glucose), were incubated under identical conditions - VCE - SSCE Biology - Question 24 - 2002 - Paper 1
Question 24
Nine tubes, containing the same amount of enzyme and the same volume of solutions of different concentrations of substrate (glucose), were incubated under identical ... show full transcript
Worked Solution & Example Answer:Nine tubes, containing the same amount of enzyme and the same volume of solutions of different concentrations of substrate (glucose), were incubated under identical conditions - VCE - SSCE Biology - Question 24 - 2002 - Paper 1
Step 1
A. No control tube exists in this experiment.
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Answer
This statement is false. A control tube is typically used to establish a baseline for comparison in experiments like this one.
Step 2
B. The rate of breakdown of glucose in tube 8 is 60 μmol/min.
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Answer
This statement is true. The information provided indicates that tube 8 showed a rate of breakdown of 60 μmol/min as per the graph.
Step 3
C. The low rate of reaction in tube 2 is due to a low enzyme concentration in that tube.
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This statement is likely false. The rate could be affected by other factors such as substrate availability; low enzyme concentration should be confirmed by experimental control.
Step 4
D. The graph tapers off at point X because all the substrate has been used in tube 9.
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Answer
This statement is true. The tapering off at point X indicates that the substrate concentration has reached a limit, suggesting completion of the reaction in tube 9.
