NTA Abhyas NEET2020BotanyRespiration in PlantsPractice
Consider the reactions and arrange the correct sequence with respect to glycolysis i. Formation of fructose-1,6-bisphosphate ii. Dehydrogenation iii. Cleavage to form triose-3-phosphate iv. Second substrate-level phosphorylation v. Dehydration
Options
- Ai → ii → iii → iv → v
- Bi → iii → ii → v → iv
- Ci → ii → iii → v → iv
- Di → iii → ii → iv → v
Correct answer
B. i → iii → ii → v → iv
Step-by-step solution
Glycolysis is the metabolic pathway that converts glucose, C 6 H 12 O 6 , into pyruvate, CH 3 COCOO− + H + . This pathway can be thought of as comprising three stages. Stage 1, which is the conversion of glucose into fructose-1,6-bisphosphate, consists of three steps: phosphorylation, isomerization and a second phosphorylation reaction. The strategy of these initial steps in glycolysis is to trap the glucose in the cell and form a compound that can be readily cleaved into phosphorylated three-carbon units. Stage 2