Question

An activator of the enzymes present in the matrix regulating krebs cycle would be...

a) citrate

b) nadh

c) atp

d) succinyl coA

e) NAD+

Answer 1

Answer: a) citrate

Explanation:

Aerobic respiration involves glycolysis and the tricarboxylic acid cycle (Krebs cycle). Pyruvate is completely degraded to carbon dioxide (CO2) and in the process, NAD is converted to NADH + H + The enzymes citrate synthase, isocitrate dehydrogenase and α-ketoglutarate dehydrogenase are the regulators of metabolic flow through the Krebs cycle and are subject to allosteric control involving NADH as inhibitor and Ca + and ADP as activators.