Which of the following is true regarding the plasma coagulation zymogens?
a. Circulate normally in their active form
b. Are serine proteases that digest peptide bonds creating a new active factor
c. Activation normally occurs throughout the body when vascular injury occurs
d. Are cofactors that induce peptide bonding to make larger active molecules
ANS: B
Zymogens are the inactive forms of the procoagulant enzymes. They are serine proteases that hydrolyze peptide bonds of their substrate.
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