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Biology Biotechnology and Its Application NCERT Single Correct MCQ
Published on: August 13, 2026

Why is repeated transfusions of genetically engineered cells required in SCID patients?

A
Transfused cells have a limited life span and
B
The introduced gene is mutated
C
Transfused cells are immortal
D
Both

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Verified by Experts
The correct answer is:
A

In SCID gene therapy, genetically engineered lymphocytes are not permanent; they have a limited life span. Therefore, repeated transfusions are required to maintain immune function.

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