1. Condensation of glycine and succinyl CoA to form aminolevulinic acid (ALA) is catalyzed by

(a) ALA oxidase
(b) ALA synthase *
(c) Ferrochelatase
(d) ALA carboxylase
(e) Succinate dehydrogenase

2. Which of the following are not components of the structure of heme?

(a) Methyl groups
(b) Vinyl groups
(c) Acetate groups *
(d) Propionate groups
(e) Pyrrole rings

3. Which of the following lipoprotein fraction is a major component of plasma cholesterol?

(a) High density lipoproteins
(b) Intermediate density lipoproteins
(c) Chylomicrons
(d) Low density lipoproteins *
(e) Very low density lipoproteins

4. Under normal conditions, mucin glycoproteins would not be expected to be present in

(a) Serum *
(b) Gastrointestinal tract (GIT)
(c) Respiratory tract
(d) Female genital tract
(e) Saliva

5. Which of the following is not an example of a glycosaminoglycan?

(a) Chondroitin sulfate
(b) Neuraminate *
(c) Heparin sulfate
(d) Keratan sulfate
(e) Hyaluronate

6. The enzyme that links aminoacids to their cognate tRNA is

(a) Topoisomerase
(b) Transferase
(c) Aminoacyl-tRNA synthetase*
(d) Ligase
(e) Ribonuclease

7. Which of the following codons is an initiation codon?

(a) ACU Termination codons> UAG, UAA, UGA.
(b) CCA
(c) UGC
(d) UAA
(e) AUG*

8. Which of the following bases can replace thymine in RNA synthesis?

(a) Adenine
(b) Cytosine
(c) Uracil*
(d) Guanine
(e) Hydro

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