NEET Biology question
The balance sheet for ATP production in glycolysis has been given below. Select the option which correctly fills up the blanks for P, Q, R and S. ['X' stands for 'nil'.]
| Step | Steps | ATP Utilisation | ATP Production | |---|---|---|---| | 1 | Glucose → Glucose-6-phosphate | P | X | | 2 | Fructose-6-phosphate → Fructose-1,6-bisphosphate | 1 | Q | | 3 | 2×1,3-bisphosphoglyceric acid → 2×3-phosphoglyceric acid | X | R | | 4 | 2×2-phosphoenolpyruvic acid → 2×Pyruvic acid | S | 2 |
Answer: (B)
Solution
Step 1 (hexokinase) uses 1 ATP, produces none: P=1. Step 2 (phosphofructokinase) only uses ATP (already shown as 1), producing none: Q=X. Step 3 (phosphoglycerate
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