Consider the following statements about cellular bioenergetics, glycolysis, and oxidative phosphorylation:
Statement 1: The enzyme phosphofructokinase (PFK-1) catalyzes the rate-limiting step in glycolysis and is allosterically regulated by AMP and ATP.
Statement 2: Oxidative phosphorylation involves the transfer of electrons from NADH and FADH₂ to oxygen via the electron transport chain, coupled to ATP synthesis through a proton gradient.
Statement 3: In biological systems, group transfer reactions often involve the transfer of phosphate, methyl, or acyl groups, which play a significant role in metabolic pathways like glycolysis and the citric acid cycle.
Which of the following options is/are correct?
1
Only Statement 1 is correct.
2
Only Statements 1 and 2 are correct.
3
Only Statements 2 and 3 are correct.
4
All three statements are correct.