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Biology
Question

According to the passage, which of the following is true of antithrombin?
  1. It reduces compounds that lead to blood clots.
  2. It stems from a genetic mutation that is rare in humans.
  3. It is a sequence of DNA known as a promoter.
  4. It occurs naturally in goats' mammary glands.

A
It reduces compounds that lead to blood clots.
B
It stems from a genetic mutation that is rare in humans.
C
It is a sequence of DNA known as a promoter.
D
It occurs naturally in goats' mammary glands.
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Solution
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Antithrombin, as the name suggests, is a small protein that inactivates the coagulation factor of blood that helps in clotting and is a glycoprotein that is 432 long chain polymer that is mainly synthesized by the liver. Its absence stops clotting of blood and it can be fatal.
So the correct option is 'It reduces compounds that lead to blood clots'.

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