Biochemistry

The end product of protein digestion in G.I.T. is - (A) Dipeptide (B) Tripeptide (C) Polypeptide (D) Amino acid An expopeptidase is - (A) Trypsin (B) Chymotrypsin (C) Elastase (D) Elastase Pepsin acts on denatured proteins to produce - (A) Proteoses and peptones (B) Polypeptides (C) Peptides (D) Dipeptides Histamine is formed from histidine by - (A) Deamination (B) Dehydrogenation (C) Decarboxylation (D) Carboxylation Pancreatic juice contains the precursors of all of the following except - (A) Trypsin (B) Chymotrypsin (C) Carboxypeptidase (D) Aminopeptidas I. MCQs (Give one correct answer) 1- In the transamination reaction shown below, which of the following are the products, X and Y ? A. Alanine, -ketoglutarate. B.Glutamate, -ketoglutarate. - C. Asparate, -ketoglutarate. D. Pyruvate, aspartate. - E. Pyruvate, alanine. - 2-Inactive zymogens (proenzymes) are precursors of all the following gastrointestinal enzymes, except: - a. Trypsin b. Pepsin c. Aminopeptidase d. Chymotrypsin - 3-. Which of the following regarding digestion of proteins are correct, except: - a. Pepsinogen is activated by autoactivation (pH2) or autocatalysis - b. The major products or protein hydrolysis are large peptides and some free amino acids - c. Most of the digested proteins are absorbed in the intestine in the form of polypeptides - d. Trypsin and chymotrypsin are secreted by the pancreas as inactive zymogens