17. Complement is characterized by all of the following EXCEPT A) l is a collect

Question

17. Complement is characterized by all of the following EXCEPT A) l is a collection or proteins synthesized in the liver n) it is a heat labile series of plasma proteins ) I is normally present in the circulation as an aetive enzyme D) t is normally present in the circulation in an inactive form Which of the following is the correcet order of activation of complement in the mannose lectin activation pathway? A) CI, C4, C2, C D) MIL, C4, C2, C3 C) C3, fhctor B, C3 D) MIBL, C2, C3, C 39. Antigens found in different species that trigger a similar antibody response are called A) heterophile antigens B) haptens c) alloantigens D) autoantigens 40. All of the following statements are true of C3 EXCEPT A) It is known as the recognition unit. B) It plays a key role in all pathways. C) It is the most abundant of the complement proteins. D) Its may function as an opsonin Hereditary lack of the complement inhibitor CLINH results in which of the following? A) 41. B) C) D) hereditary angioedema paroxysmal nocturnal hemoglobinuria mrnune complex disease meningitis 42. When a human responds to a bacterial antigen, the bacterial antigen is classified as a(an): A) autoantigen B) alloantigen C) heteroantigen D) holoantigen

Explanation / Answer

Amswere :

Question 37 : All of the above statements about complement system are correct except "it is normally present in the circulation as an active enzyme".

Question 38 : The correct order of activation of complement in the mannose lectin activation pathway is "MBL, C4, C2, C3".

Question 39 : The antigen found in different species that trigger a similar anyibody response are called "heterophile antigen".

Question 40 : All the statement about C3 protein are true except "it is known as the recognition unit".

Question 41 : Heriditory angioedema is caused due to heridatory lack of complement inhibitor C1-INH.

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