Question

40.Fatty acid synthase is an enzyme in the lipid metabolism pathway, that: A. occurs in the mitochondrion in animal cells, 2 nor Section A B. utilises NADH as an electron donor C) requires NADPH as a substrate. D. requires acetic acid as a substrate. E. consists of a single multifunctional protein in plants and bacteria. 41.One round of beta oxidation produces 1 molecule of acetyl-CoA from a saturated Acyl-CoA molecule. Which reducing equivalents are made in this process in which cellular compartment in eukaryotes: A. 2 NADH in the mitochondria B. 1 FADH2 and 1 NADH in the cytosol C. 1 FADH2 and 1 NADPH in the cytosol D. 1 FADH and 1 NADH in the mitochondria lomou E. 1 FADH2 and 1 NADPH in the mitochondria Vela 42. A process in which excess oxidation occurs in the liver mitochondria and results in acetyl-CoA forming acetoacetate and B-hydroxvbutyrate is known as: A. acidosis eb HOAM A oou8 B. ketosis C. gluconeogenesis D. glycogenosis E. glyceroneogenes is. xel bube non 3 43. Which reaction best describes the deamination of the majority of amino acids? E A. oxidation A B. reduction C. condensation D. transamination E. transacetylation 44 Which common metabolic intermediate is generated by the degradation of the amino acids Ala, Cys, Gly, Ser and Thr?: hatero A. Acetoacetate. B. Citrate C. Fumarate D. Oxaloacetate. E. Pyruvate. 45. The neurotransmitters, epinephrine and norepinephrine shown below are synthesized from the amino acid A. tryptophan B) tyrosine C. glutamate HO HO- CH-CH,-NH-R D. aspartate E. lysine OH R H Norepinephrine (noradram R-CH, Epinephrins

Answer 1

40. Fatty acid synthase are enzyme required for the production of fatty acids. They are derived from carbohydrates in cytoplasm. It needs the presence of NADPH which is oxidised which then helps fatty acid synthase to perform its function. It doesn't require acetic acid as substrate but instead it converts malonyl CoA and acetyl CoA. It requires NADPH as electron donor. And it is a multi protein enzyme.

Answer is C.

41. Beta oxidation of acyl CoA into acetyl CoA occurs in the mitochondria of a cell. The oxidation produces 1NADH fromNAD+ and 1 FADH2 from FAD in the mitochondria.

Answer is D.

42. Acidosis occurs due to action of lungs and kidneys. It is not related to liver

Ketosis is done by liver which converts acetyl CoA to acetoacetate, which is further converted to beta hydroxybutyrate.

Gluconeogenesis is the production of glucose from non carbohydrates types substance. It takes place in liver

Glycogenesis is the process of producing glycogen from glucose in liver.

Glyceroneogenesis is a process which synthesises glycerol-6-phosphate from molecules other than glucose. This occurs when glucose level Decreases. It occurs in liver

So it is evident that the answer is b.

43. Deamination in the body occurs by transamination. Transamination is the process of removal of amine groups from amino acid.

Answer is D.

44. Degradation of amino acids produces pyruvate which then become precursor of gluconeogenesis.

Answer is E

45. Epinephrine and nor epinephrine are produced from amino acids tyrosine and phenylananine.

Answer is B.