Review Note
Last Update: 10/21/2024 03:14 PM
Current Deck: BCE3
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Front
A certain metabolic pathway can be diagrammed as below, where A, B, C, and D are metabolites and X, Y, and Z are the enzymes that catalyze the reactions. The free energy changes (ΔG°') for each reaction are given below the reaction arrows. Select the FALSE statement about this pathway.
A [X] → B (−0.3kJ/mol)
B [Y] → C (−12.6kJ/mol)
C [Z] → D (−1.0kJ/mol)
- A) The major regulatory point for the pathway is enzyme Y.
- B) If an inhibitor blocks the function of enzyme Z, the concentration of metabolite D will decrease.
- C) If an inhibitor blocks the function of enzyme Z, the concentration of metabolite C will increase.
- D) If an inhibitor blocks the function of enzyme Z, the concentration of metabolite B will increase.
- E) The reaction catalyzed by enzyme X is close to equilibrium.
Back
D) If an inhibitor blocks the function of enzyme Z, the concentration of metabolite B will increase.
This statement is false because blocking enzyme Z would lead to an accumulation of metabolite C, not B. The concentration of B would not be directly affected by inhibiting enzyme Z.
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