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GS/GA for Railway, SSC , AIIMS, CBSE exam

A transition from the solid to gas phase with no intermediate liquid stage is called?
[A] Evaporation
[B] Sublimation
[C] Adsorption
[D] Absorption
Ans- B
The transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase is called sublimation.

Which among the following is essential for both activation and action of thrombin ?
[A] Na+
[B] Cl-
[C] Ca2+
[D] Mg2+
Answer: C [Ca2+]
Thrombin is a key enzyme in blood clotting, and calcium ions play a crucial role in its activation and function during the coagulation cascade.

Which among the following is not a function of Sympathetic nerves in Autonomic nervous
system?
[A] Enhancing the heart beats
[B] constricting the blood vessels
[C] dilate pupils
[D] contract urinary bladder
Answer: D
contract urinary bladder is a function of
Parasympathetic nerves. Sympathetic nerves relax urinary bladder.