Identify the missing step in the image below:
Correct answer: D. Phosphofructokinase
- A. Glyceraldehyde-3-phosphate
- B. Dihydroxyacetone phosphate
- C. Fructose-1-phosphate
- D. Phosphofructokinase
Explanation
The missing step involves phosphorylation of fructose-6- phosphate by phosphofructokinase-1 (PFK-1), forming fructose-1,6-bisphosphate, a key rate-limiting step in glycolysis.
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