Question Detail
Question
During glycolysis ATP is used up in
Correct Answer
Option D is the correct answer.
Detailed Explanation
Glycolysis has an energy investment phase where ATP is consumed. This occurs in two steps: Step 1 (hexokinase converts glucose to glucose-6-phosphate) and Step 3 (phosphofructokinase converts fructose-6-phosphate to fructose-1,6-bisphosphate). Steps 7 and 10 are where ATP is produced (substrate-level phosphorylation). Therefore, none of the given options correctly list both steps 1 and 3.
Hint
In which two steps of glycolysis is ATP used to 'prime' the molecule for splitting?