Biochemistry MCQ Modules

The peptide bond: has a partial double bond character is charged but non polar has cis conformation can be easily destroyed by acids keeps the integrity of proteins by hydrophobic interaction   Regarding elastin: it is a tough protein with high tensile strength it is rich in proline and lysine it is soluble protein polymer cannot regain its original length when stretched mutation of tropoelastin gene leads to marfans syndrome   Which is incorrect about proline: it contains imino group it has uncharged polar group important for fibrous structure of collagen doesn’t participate in hydrogen bonds its side chain has

1. A drug which prevents uric acid synthesis by inhibiting the enzyme xanthine oxidase is(A) Aspirin (B) Allopurinol(C) Colchicine (D) Probenecid 2. Which of the following is required for crystallization and storage of the hormone insulin?(A) Mn++ (B) Mg++(C) Ca++ (D) Zn++ 3. Oxidation of which substance in the body yields the most calories(A) Glucose (B) Glycogen(C) Protein (D) Lipids 4. Milk is deficient in which vitamins?(A) Vitamin C (B) Vitamin A(C) Vitamin B2 (D) Vitamin K 5. Milk is deficient of which mineral?(A) Phosphorus (B) Sodium(C) Iron (D) Potassium 6. Synthesis of prostaglandinsis is inhibited by(A) Aspirin (B) Arsenic(C)