Question

During which step(s) of cellular respiration does the cell generate ATP? Glycolysis Citric Acid Cycle Oxidative Phosphorylation A and B only are true B and C only are true A and C only are true A. B. and C are all true What is substrate-level phosphorylation? The phosphorylation of reactants by phosphatases an enzyme directly adds one phosphate at a time to a molecule Multiple phosphorylation's happening at the same time Phosphorylation that happens outside the mitochondria

Answer 1

Answers :

Question number 1 : The correct answer is G ( A, B, C all are true)

Question number 2 : The correct answer is B ( An enzyme directly adds one phosphate at a time to molecule)

Explanation : The formation of ATP by phosphoryl group transfer from a substrate such as 1,3-bisphosphoglycerate
is referred to as a substrate-level phosphorylation, to distinguish this mechanism from respiration-linked phosphorylation. The 7^th reaction catalysed by Phosphoglycerate kinase and the 10^th reaction catalysed by Pyruvate kinase are involved in the substrate level phosphorylation. These two enzymes work in Payoff phase of glycolysis (Oxidative conversion of glyceraldehyde 3-phosphate to pyruvate and the coupled formation of ATP and NADH.