Q19: The predominant isozyme of LDH in cardiac
muscle is ?
A) LD-1
B) LD-2
C) LD-3
D) LD-5
Answer: A) LD-1
Q20: Both Vitamin K and C are involved in ?
A) The synthesis of clotting factors
B) Post translational modifications
C) Antioxidant mechanisms
D) The microsomal hydoxylation reactions
Answer: B) Post translational modifications
Q21: Enzymes that move a molecular group from one
molecule to another are known as ?
A) Ligases
B) Oxido-reductases
C) Transferases
D) Dipeptidases
Answer: C) Transferases
Q22: The membrane protein, clathrin is involved in ?
A) Cell motility
B) Receptor mediated endocytosis
C) Exocytosis
D) Cell shape
Answer: B) Receptor mediated endocytosis
Q23: The amino acid residue having an imino side
chain is ?
A) Lysine
B) Histidine
C) Tyrosine
D) Proline
Answer: D) Proline
Q24: Which one of the following molecules is used
for cell signalling ?
A) CO2
B) O2
C) NO
D) N2
Answer: C) NO
Q25: All of the following hormones have cell surface
receptors except ?
A) Adrenalin
B) Growth hormone
C) Insulin
D) Thyroxine
Answer: D) Thyroxine
Q26: Fluoride, used in the collection of blood
samples for glucose estimation, inhibits the enzyme ?
A) Glucokinase
B) Hexokinase
C) Enolase
D) Glucose-6-phosphatase
Answer: C) Enolase
