In nucleic acids,the sequence of the backbone components is

Which of the following is not present in a nucleotide?

Given below are two statements:
Statement $I$: $A$ unit formed by the attachment of a base to $1'-$position of sugar is known as nucleoside.
Statement $II$: When nucleoside is linked to phosphorous acid at $5'-$position of sugar moiety,we get nucleotide.
In the light of the above statements,choose the correct answer from the options given below:

Adenine base is present in which of the following?

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

If one strand of $DNA$ has the sequence $ATCGTATG$,the sequence in the complementary strand would be