Assertion (A): Viruses are considered obligate parasites. Reason (R): Viruses lack their own metabolic machinery and require a host cell to replicate.
A. Both A and R are true, and R is the correct explanation of A.
B. A is false, but R is true.
C. A is true, but R is false.
D. Both A and R are true, but R is not the correct explanation.
Answer: Option A
Solution (By JKSSB Mock Tests)
Viruses are non-living outside a host cell and cannot carry out metabolism or reproduce independently. They hijack the host cell's machinery to replicate. Hence they are obligate intracellular parasites. The reason correctly explains the assertion. Even though some debate exists on whether viruses are living, the statement that they are obligate parasites and lack metabolic machinery is accurate.
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