NEET · Chemistry · STD 12 - 10. Biomolecules

The correct statement with regard to the secondary structure of DNA/RNA is :

A RNA possesses a single strand helix structure and contains thymine as one of the four bases.
B DNA possesses a double strand helix structure and contains thymine as one of the four bases.
C RNA possesses a double strand helix structure and contains uracil as one of the four bases.
D DNA possesses a single strand helix structure and contains uracil as one of the four bases.

Verified Solution

Answer & Solution

Correct Answer

(B) DNA possesses a double strand helix structure and contains thymine as one of the four bases.

Step-by-step Solution

Detailed explanation

(B) DNA possesses a double strand helix structure and contains thymine as one of the four bases.
DNA possesses a double strand helix structure and contains adenine, guanine, cytosine, and thymine as its four bases.
RNA possesses a single strand helix structure and contains adenine, guanine, cytosine, and uracil as its four bases.
Thus, the statement that DNA possesses a double strand helix structure and contains thymine as one of the four bases is correct.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From NEET

Explore more questions on app