Which of the following is not present in a nucleotide?

The process of $DNA$ replication is known as........

Which of the following statements about $DNA$ is not correct?

In both $DNA$ and $RNA$,the heterocyclic base and phosphate ester linkage are present at which positions of the sugar respectively?

If one strand of $DNA$ has the sequence $ATGCTTGA$,what would be the sequence of its complementary strand?

$RNA$ and $DNA$ are chiral molecules,their chirality is due to