Which of the following is/are correct?

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(A) nucleotide is formed by the esterification of a nucleoside with a phosphate group at the $5'$-$OH$ position of the sugar. This statement is correc

Vedclass · Accepted Answer

$(A), (B), (C), (D)$

Vedclass · Answer

(A) nucleotide is formed by the esterification of a nucleoside with a phosphate group at the $5'$-$OH$ position of the sugar. This statement is correct.$(B)$ $A$ nucleoside is formed by the attachment of a nitrogenous base to the $1'$-position of a pentose sugar ($ribose$ or $deoxyribose$). This statement is correct.$(C)$ $DNA$ contains $2$-deoxyribose sugar and thymine,whereas $RNA$ contains ribose sugar and uracil. Thus,they differ in both sugar and nitrogenous base. This statement is correct.$(D)$ In $DNA$ double helix,adenine $(A)$ pairs with thymine $(T)$ via two hydrogen bonds $(A=T)$,and cytosine $(C)$ pairs with guanine $(G)$ via three hydrogen bonds $(C \equiv G)$. This statement is correct.Therefore,all statements $(A), (B), (C),$ and $(D)$ are correct.

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