Biology Biotechnology and Its Application All Topic Question For Revision Test Single Correct MCQ
Published on: August 12, 2026

ADA deficiency causes-

A
Inhibition of lymphocytes proliferation
B
Inhibition of leucocytes proliferation
C
Accumulation of gangliosides in WBC
D
Reduction in the number of RBCs

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The correct answer is:
A

ADA (Adenosine Deaminase) deficiency causes SCID (Severe Combined Immunodeficiency Disease). Due to the lack of ADA enzyme, lymphocytes (especially T-lymphocytes) cannot proliferate normally, leading to severe immune deficiency.

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