CBSE Class 12 Chemistry 2023 Delhi Set 3 Solved Paper

Question : 6 of 13

Marks: +1, -0

Assertion (A): The backbone of DNA and RNA molecule is a chain consisting of heterocyclic base, pentose sugar and phosphate group.
Reason (R): Nucleotides and nucleosides mainly differ from each other in presence of phosphate group.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

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