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Biochemistry General 1d756b19

A genetic disorder renders fructose 1, 6–biphosphatase in liver less sensitive to regulation by fructose 2, 6–biphosphate. All of the following metabolic changes are observed in this disorder except

A
Level of fructose 1, 6–biphosphate is higher than normal
B
Level of fructose 1, 6–biphosphate is lower than normal
C
Less pyruvate is formed
D
Less ATP is generated
High-Yield Explanation
Level of fructose 1, 6-biphosphate is higher than normal Fructose-1, 6-bisphosphatase is inhibited by fructose-2, 6-bisphosphate. If fructose-1, 6-bisphosphatase becomes less sensitive to inhibition caused by fructose-2, 6-bisphosphate, its activity will increase and there will be increased conversion of fructose-1, 6-bisphosphate into fructose-6-phosphate (reaction catalyzed by fructose-1, 6-bisphosphatase). Thus, level of fructose-1, 6-bisphosphate will decrease. Fructose-1, 6-bisphosphatase is a regulating enzyme for gluconeogenesis, and therefore gluconeogenesis will increase. As the cycle will shift more toward gluconeogenesis, glycolysis will decrease with a resultant decrease in production of ATP and pyruvate.

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