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Coagulation Cascade

During the co...

Question

During the coagulation of blood, vitamin K helps in the

A

Conversion of prothrombin to thrombin

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B

Formation of prothrombin

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C

Conversion of fibrinogen to fibrin

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D

Formation of thromboplastin

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Solution

The correct option is B
Formation of prothrombin

Vitamin K is essential for the synthesis of several blood clotting proteins of which prothrombin is a prominent one.

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Q. Identify the correct sequence of blood coagulation (a) Activation of prothrombin (b) Formation of prothrombin activator (c) Formation of blood clot (d) Conversion of fibrinogen to fibrin

Q. Assertion :Thrombin is necessary to initiate blood coagulation. Reason: Thrombin helps in the formation of thromboplastins.

Q. Which prevents conversion of prothrombin to thrombin in an undamaged blood vessel?

Q. Which of the following is / are wrong about blood clotting?
A. Fibrinogen

T h r o m b o p l a s t i n - -------- \to T h r o m b i n

B. Injured tissue + blood Platelets

\to

Release thromboplastin
C. Prothrombin

T h r o m b i n - ----- \to

fibrin
D. Fibrin + Red Blood corpuscles

\to

Q. Select the correct option for given reaction occurs during blood clotting–

(i)

→ Thrombin → Fibrin

(ii)

→ Prothrombin → Thrombin

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