41) The amino acid and ornithine a) Glutamie acid c) Alanine e) Arginine 42) The

Question

41) The amino acid and ornithine a) Glutamie acid c) Alanine e) Arginine 42) The enzyme is the regulated arvd committing step to urea synthesis a) Carbamoyl phosphate synthetase b) Carbamoyl phosphate synthetase II c) Ornithine transcarbamoylase d) Aspartate transcarbamoyiase e) Glutamate transaminase 43) Since ammonia is neurotoxic to urotelic organisms, which includes bumans, nitrogen atoms can be transported from tissues to the liver and kidneys as a) Glutamic acid b) Glutamine c) Aspartic acid d) Alanine e) All of the above 44) If you were to eat more dietary protein than your body requires for protein synthesis, what would you predict would happen? a) Body fat gain b) Muscle gain c) Elevated levels of circulating blood glutamine and glutamate d) A and C e) Band C 45) Synthesis of glycogen by the enzyme glycogen synthase requires an activated form of glucose that is synthesized by the condensation of glucose 1-phophate with a) ATP b) GTP c) CTP d) UTP e) TTP CELLBI X105 Form A

Explanation / Answer

41)e

Arginine.

Mainly arginine is cleaved by arginase to produce urea amd ornithine which is cleaved by urease to produce ammonia and carbon dioxide.

42)a

Carbomyl phosphate synthetase1 is commited step of urea cycle

It catalyzes a 3 step reaction with carbomyl phosphates and carbamate intermediate s it also involves the clevage of 2 phosphate bond of atps.

43)e

All of the above

All of them are non toxic to human body . Mainly glutamine followed by alanine are transported to liver and kidney.they are produced within the body.

44) b and c

More protein intake increases more muscle gain.elevated circulating blood glutamine and glutamate increase s.

45)d

UTP

Synthetis of glycogenby enzyme glycogen synthase requires activated form of glucose that is synthesized by condensation of glucose 1 phosphate with UTP .Formation helps in formation of UDP glucose in reaction catalysed by UDP glucose 1 phosphate uridylyl transferase.

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