Q.

Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate.                [2024]

1 Malic acid  Oxaloacetic acid  
2 Succinic acid  Malic acid  
3 Succinyl-CoA  Succinic acid  
4 Isocitrate  α-ketoglutaric acid  

Ans.

(3)