All of the following intermediates of citric acid cycle can be formed from amino acids except 

(A) α-Ketoglutarate 

(B) Fumarate 

(C) Malate 

(D) Oxaloacetate

All of the following are intermediates of citric acid cycle except 

(A) Oxalosuccinate 

(B) Oxaloacetate 

(C) Pyruvate 

(D) Fumarate 

Which one of the following cofactors must be utilized during the conversion of acetyl CoA to malonyl CoA? 

(A) TPP 

(B) ACP 

(C) NAD⁺ 

(D) Biotin

In TCA cycle, oxalosuccinate is converted to α-ketoglutarate by the enzyme: 

(A) Fumarase 

(B) Isocitrate dehydrogenase 

(C) Aconitase 

(D) Succinase

If all the enzymes, intermediates and cofactors of the citric acid cycle as well as an excess of the starting substrate acetyl CoA are present and functional in an organelle free solution at the appropriate pH, which of the following factors of the citric acid cycle would prove to be rate limiting? 

(A) Molecular oxygen 

(B) Half life of enzyme 

(C) Turnover of intermediates 

(D) Reduction of cofactors 

A carrier molecule in the citric acid cycle is 

(A) Acetyl-CoA 

(B) Citrate 

(C) Oxaloacetate 

(D) Malate

In reversible non-competitive enzyme activity inhibition 

(A) Inhibitor bears structural resemblance to substrate 

(B) Inhibitor lowers the maximum velocity attainable with a given amount of enzyme 

(C) K_m is increased 

(D) K_m is decreased

Enzyme inhibition caused by a substance resembling substrate molecule is 

(A) Competitive inhibition

(B) Non-competitive inhibition 

(C) Feedback inhibition 

(D) Allosteric inhibition

The enzyme using some other substance, not oxygen as hydrogen acceptor is 

(A) Tyrosinase 

(B) Succinate dehydrogenase 

(C) Uricase 

(D) Cytochrome oxidase

An enzyme which uses hydrogen acceptor as substrate is 

(A) Xanthine oxidase 

(B) Aldehyde oxidase 

(C) Catalase 

(D) Tryptophan oxygenase