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Question
Assertion :DNA is considered to be better genetic material than RNA for most organisms. Reason: 2- OH group present in DNA makes it labile and less reactive.
Assertion :DNA is considered to be better genetic material than RNA for most organisms. Reason: 2- OH group present in DNA makes it labile and less reactive.
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Solution
The correct option is C Assertion is correct but Reason is incorrect
The genetic material should be stable enough not to change with different stages of life cycle, age or with change in the physiology of the organism. The DNA strands being complementary, if separated by heating come together, when appropriate conditions are provided. Further, 2-OH group present at every nucleotide in RNA is a reactive group and makes RNA labile and easily degradable. RNA is also now known to be catalytic, hence reactive. Therefore, DNA chemically is less reactive and structurally more stable when compared to RNA. Therefore, among the two nucleic acids, the DNA is a better genetic material.So, the correct answer is 'Assertion is correct but Reason is incorrect'.
The genetic material should be stable enough not to change with different stages of life cycle, age or with change in the physiology of the organism. The DNA strands being complementary, if separated by heating come together, when appropriate conditions are provided. Further, 2-OH group present at every nucleotide in RNA is a reactive group and makes RNA labile and easily degradable. RNA is also now known to be catalytic, hence reactive. Therefore, DNA chemically is less reactive and structurally more stable when compared to RNA. Therefore, among the two nucleic acids, the DNA is a better genetic material.
So, the correct answer is 'Assertion is correct but Reason is incorrect'.
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