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31.

Sickle-cell anaemia is exhibited by:

A.	Reduction in RBCs due to excess oxygen tension	B.	Defect in beta-chain of haemoglobin
C.	Defect in alpha-chain of haemoglobin	D.	None of these

32.

PTC (phenylthiocarbamide) tastes:

A.	Bitter	B.	Sour
C.	Sweet	D.	None of these

33.

How much percent people lack ability to taste PTC:

A.	10%	B.	20%
C.	30%	D.	40%

34.

ABO Blood groups were discovered by:

A.	Lansteiner	B.	Bernstein
C.	Weiner	D.	Lavine

35.

A person of blood group AB can receive blood from donor of:

A.	A - group	B.	B - group
C.	AB - group	D.	All group

36.

For a patient of AB - group a donor can be of:

A.	A and B - group	B.	O - group
C.	AB - group	D.	Any of ABO - groups

37.

Which one is universal recipient:

A.	Person of A and B - groups	B.	Person of O group
C.	Person of AB - group	D.	None of these groups

38.

Which of the blood can be given to any person:

A.	A - group	B.	B - group
C.	O - group	D.	AB - group

39.

Universal donor is a person of blood group:

A.	A	B.	B
C.	O - group	D.	AB

40.

If a patient of blood group - B needs a transfusion, the donor must belong the blood group:

A.	A	B.	B
C.	O & B	D.	AB