The smallest structure having the power of replicating itself is:

Which of the following nitrogenous bases is not found in $DNA$?

In a $DNA$ molecule,the antiparallel strands mean that:

Choose the incorrect sentence.

$S$ Statement: $DNA$ is inherited by organisms produced by parents.
$R$ Reason: $DNA$ acts as a gene.
$(a)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(b)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(c)$ $S$ is true and $R$ is false.
$(d)$ $S$ is false and $R$ is true.
$(e)$ Both $S$ and $R$ are false.

Telomeric repetitive $DNA$ sequences control the function of eukaryotic chromosomes because they...