Froggy Jumps Protein metabolismVersion en ligne MCQ,Formative Assessment. par Preethi 1 Which of the following enzymes initiates protein digestion in the stomach? a Trypsin b Pepsin c Carboxypeptidase 2 Which of the following is NOT an endopeptidase? a Carboxypeptidase b Chymotrypsin c Trypsin 3 Absorption of amino acids from the intestinal lumen into enterocytes occurs mainly by: a Passive diffusion b Facilitated diffusion c Active transport 4 A deficiency of pancreatic enzymes leads to: a Increased absorption of proteins b Decreased protein digestion c No change in protein metabolism 5 In transamination, α-ketoglutarate commonly acts as: a Amino group donor b Amino group acceptor c Oxidizing agent 6 Which of the following statements about transamination is TRUE? a It releases free ammonia into the blood b It directly generates urea c It forms new amino acids and keto acids 7 Where does the urea cycle primarily take place? a Kidney b Liver c Muscle 8 Which of the following is the first step in the urea cycle? a Formation of citrulline b Formation of carbamoyl phosphate c Formation of argininosuccinate 9 A newborn presents with hyperammonemia, vomiting, and lethargy. Which disorder should be a Diabetes mellitus b Urea cycle disorder c Phenylketonuria 10 The immediate precursor of urea in the cycle is: a Citrulline b Arginine c Ornithine
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