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HSSC Dark Room Attendant / Dt.-31-12-2022 Evening Shift (Cat. No.-16)
📆 December 17, 2024
Total Questions: 100
41.
Which of the following is not a neurotransmitter?
(a) Acetylcholine
(b) Glutamic acid
(c) Tyrosine
(d) None of the above
Correct Answer:
(c) Tyrosine
42.
Which of the following hormones is responsible for the activation of phospholipase C?
(a) Cortisol
(b) Adrenalin
(c) Serotonin
(d) Vasopressin
Correct Answer:
(d) Vasopressin
43.
Which of the following is an investigation of the muscle cell's sarcolemma?
(a) Microtubules
(b) T-tubules
(c) Cisternae
(d) Sarcoplasmic reticula
Correct Answer:
(b) T-tubules
44.
Which of the following enzymes is used in PCR?
(a) EcoR II
(b) EcoR I
(c) Taq DNA polymerase
(d) HRP
Correct Answer:
(c) Taq DNA polymerase
45.
When the velocity of enzyme activity is plotted against substrate concentration, which of the following is obtained?
(a) Parabola
(b) Straight line with negative slope
(c) Straight line with positive slope
(d) Hyperbolic curve
Correct Answer:
(d) Hyperbolic curve
46.
Which of the following is an example of epimers?
(a) Glucose and Ribose
(b) Ribose and Galactose
(c) Galactose and Mannose
(d) Glucose and Galactose
Correct Answer:
(b) Ribose and Galactose
47.
Which of the following catalyzes the reversible degradation of 2-phosphoglycerate to phosphoenolpyruvate?
(a) Trypsin
(b) Enolase
(c) Hexokinase
(d) Chymotrypsin
Correct Answer:
(b) Enolase
48.
What is the lifespan of platelets?
(a) 1 month
(b) 14 days
(c) 8-12 days
(d) 1-7 days
Correct Answer:
(c) 8-12 days
49.
If the blood of two different groups are mixed together, what problem is observed?
(a) Agglutination
(b) Embolism
(c) Coagulation
(d) Thrombus formation
Correct Answer:
(a) Agglutination
50.
What is the optimum temperature to store blood right after collecting it?
(a) 22°C
(b) 20°C
(c) 15°C
(d) 14°C
Correct Answer:
(a) 22°C
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