Practice question
Question
The interconversion of fructose 6-phosphate to fructose 1,6-bisphosphate is a critical step in central metabolism in plants. Followings are certain statements regarding this interconversion. A. Phosphofructokinase catalyzes the C6 phosphorylation of fructose 6- phosphate. B. Plastid phosphofructokinase is activated by Pi while cytosolic phosphofructokinase is activated by phosphenolpyruvate. C. Cytosolic fructose1,6-bisphosphatase is strongly inhibited by fructose 2,6- bisphosphate. D. Pyrophosphate-dependent phosphofructokinase catalyzes a reversible reaction of interconversion of fructose 6-phosphate to fructose 1,6- bisphosphate. Which one of the following options is a combination of all correct statements?
Explanation
Analysis of the interconversion of fructose 6-phosphate to fructose shows C and D represents established outcome. functional assays supports option D, whereas distractors confuse substrate or regulatory direction and fail to reproduce observed results.
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