$A$ gene is a segment of a molecule of

Two nucleotides are joined together by a linkage known as:

In $DNA$,the complementary bases are

Hydrolysis of which of the following nucleic acids does not give an equal number of $A$ and $T$ or $G$ and $C$?
$(A)$ $m$-$RNA$
$(B)$ Single strand $DNA$
$(C)$ $r$-$RNA$
$(D)$ Double helix $DNA$

Adenine base is present in which of the following?

Which one is not a constituent of nucleic acid?