Assertion- nbsp-TMV is a virus which causes mosaic disease- Reason- nbsp-TMV has RNA as genetic material-If both assertion and nbsp-reason are true and reason is the correct explanation nbsp-of assertion nbsp- nbsp-If assertion is true but nbsp-reason is false nbsp-If both assertion and nbsp-reason are true but reason is not the correct nbsp-explanation of assertion nbsp-If both assertion and nbsp-reason are false nbsp-

The correct option is C If both assertion and nbsp;reason are true but reason is not the correct nbsp;explanation of assertion nbsp;Tobacco mosaic virus ...

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Byju's Answer

Standard XII

Biology

Study of Disease

Assertion: ...

Question

Assertion: TMV is a virus which causes mosaic disease.

Reason: TMV has RNA as genetic material.

If both assertion and reason are true and reason is the correct explanation of assertion

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If both assertion and reason are true but reason is not the correct explanation of assertion

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If assertion is true but reason is false

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If both assertion and reason are false

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Solution

The correct option is B If both assertion and reason are true but reason is not the correct explanation of assertion
Tobacco mosaic virus (TMV) is single stranded RNA virus which infects a wide range of plants, especially tobacco. The infection causes characteristic patterns, such as mosaic (mosaic disease). This is not because RNA is the genetic material of the virus. Hence, reason is not the justification for the assertion.

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Assertion: TMV is a virus which causes mosaic disease. Reason: TMV has RNA as genetic material.

Assertion: TMV is a virus which causes mosaic disease.

Reason: TMV has RNA as genetic material.