In glycolysis, the six-carbon molecule is split into G3P and DAP, then DAP is also converted into G3P in step no. _.
Correct answer: C. 4 & 5
- A. 2 & 3
- B. 3 & 4
- C. 4 & 5
- D. 5 & 6
Explanation
In glycolysis, during step 4, the six-carbon molecule fructose 1,6-bisphosphate is split into two three-carbon molecules: glyceraldehyde-3-phosphate (G-3-P) and dihydroxyacetone phosphate (DAP). Step 5 involves the conversion of DAP into another G-3-P molecule, ensuring both products of the split can continue through glycolysis. Options 2 & 3 and 3 & 4 are incorrect because they describe steps before or during the splitting process but do not include the conversion of DAP. Options 5 & 6 are incorrect because step 6 is where G-3-P is oxidized, unrelated to the splitting and conversion process.
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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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