Question

Assertion: Trypsin helps in the blood digestion of predator animals.
Reason: Trypsin hydrolyzes fibrinogen.
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
(b) If both the assertion and reason are true but the reason is not a correct explanation of assertion
(c) If the assertion is true but the reason if false
(d) If the assertion and the reason are false
(e) If the assertion is false but reason is true

Answer 1

Hint: Trypsin is responsible for the hydrolysis of fibrinogen into fibrin in animals. Fibrin threads polymerize and form a meshwork that traps blood cells, platelets, etc to form clot or coagulum.

Complete answer:
Trypsin is basically a protein digesting enzyme found in the animals. In the predator animals it plays an important role in the digestion of blood that they drink from their prey. For the digestion of that blood, the enzyme trypsin hydrolyzes fibrinogen into fibrin. This hydrolysis leads to the formation of a blood clot that helps in the digestion of blood taken from the prey. Fibrinogen is a component of blood and when it is converted into fibrin, a clump of blood is formed in the gel state. and helps in the breakdown of fibrinogen (a component of blood) into fibrin. The fibrin threads in the clot are joined together by the weak non-covalent hydrogen bonds and in this way the clot is now easy for the predator animals to digest further.
- In humans, fibrin monomers form fibrin thread with the help of fibrin stabilizing factor.
- In humans, fibrinogen is synthesized in the liver and stored in the blood plasma.
- In human beings, a total of 13 factors are involved in blood coagulation.
So, the correct answer is, ‘if both the assertion and the reason are true and the reason is a correct explanation of the assertion’.

Note: Trypsin helps in the digestion of proteins in humans and many animals. In humans, thrombin does the same action as trypsin in animals. Thrombin is responsible for the hydrolysis of fibrinogen into fibrin in human beings.