Question

Which one is not applicable to RNA

• A. Complementary base pairing
• B. 5' phosphoryl and 3' hydroxyl ends
• C. Heterocyclic nitrogenous bases
• D. Chargaff s rule

Answer 1

The correct option is D Chargaff s rule

RNA is usually single-stranded polynucleotide.

Erwin Chargaff proposed that the ratio between adenine and thymine and guanine and cytosine are equal and constant.

Due to the single-stranded nature, there is no specific relation between purine and pyrimidine contents, thus the guanine content is not equal to cytosine ( as in the case of DNA).

So, the correct option is 'Chargaff s rule'