BiologyQ101–101 of 174 questions
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101
BiologyMediumMCQAIPMT · 2001
Assertion : $TMV$ is a virus which causes mosaic disease.
Reason : $TMV$ has $RNA$ as genetic material.
Reason : $TMV$ has $RNA$ as genetic material.
A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.
Solution
(B) The Assertion is correct because $TMV$ (Tobacco Mosaic Virus) is indeed the causative agent of mosaic disease in tobacco plants.
The Reason is also correct because the genetic material of $TMV$ is a single-stranded $RNA$ molecule.
However,the fact that $TMV$ has $RNA$ as its genetic material does not explain why it causes mosaic disease; these are two independent biological facts about the virus. Therefore,the Reason is not the correct explanation of the Assertion.
The Reason is also correct because the genetic material of $TMV$ is a single-stranded $RNA$ molecule.
However,the fact that $TMV$ has $RNA$ as its genetic material does not explain why it causes mosaic disease; these are two independent biological facts about the virus. Therefore,the Reason is not the correct explanation of the Assertion.
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