Question

Assertion (A): The children with SCID, cannot make adenosine aminase, an enzyme essential for immune system.

Reason (R): SCID can be cured by giving injections of matured B and T cells.

Options

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Assertion (A) is true but reason (R) is false.

Explanation:

SCID may result from deficiency of adenosine deaminase (ADA), an enzyme important for immune function. Giving injections of mature B and T cells is not the stated cure; gene therapy can introduce a functional ADA gene.