Q.

Which of the following are involved in the first step of the TCA cycle?
(I) Pyruvic acid 
(II) Acetyl –CoA 
(III) Malic acid 
(IV) OAA 
(V) Water 

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a

I, IV and V 

b

II and IV only 

c

II, IV and V  

d

II, III and V

answer is C.

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Detailed Solution

Acetyl CoA, OAA and water  are involved in the first step of the TCA cycle. This results in the formation of 6 carbon compound which is citric acid.

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