First slide

Aerobic Respiration

Question

Substrate entrant of TCA cycle is:
(a) 3-carbon compound formed in cytoplasm
(b) Formed in mitochondrial matrix through oxidative decarboxylation of pyruvic acid
(c) Two carbon compound acetyl-CoA

Easy

A

a only
B

a and b only
C

a, b and c
D

b and c only

Solution

The first substrate that enter into TCA cycle is Acetyl-CoA which is a 2 carbon compound and is formed from link reaction or during oxidative decarboxylation of pyruvic acid.

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