Phosphofructokinases enzyme converts fructose-6-phosphate into:
Correct answer: B. Fructose-1,6-bisphosphate
- A. Fructose-1,4-phosphate
- B. Fructose-1,6-bisphosphate
- C. Bisphosphate
- D. Fructose
Explanation
Phosphofructokinase (PFK) plays a critical role in glycolysis by catalyzing the conversion of fructose-6-phosphate into fructose-1,6-bisphosphate. This reaction involves the transfer of a phosphate group from ATP to fructose-6-phosphate, forming fructose-1,6-bisphosphate and ADP. This step is key for regulating the glycolytic pathway. Option B is correct because it reflects the specific phosphorylated product of this reaction. Option A is incorrect because it specifies the wrong positions for phosphorylation. Option C is too vague, as it does not specify the positions of the phosphate groups. Option D is incorrect because it suggests a conversion that does not occur in this enzymatic reaction.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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