Which of the following is not present in $DNA$?

The primary structure of a nucleic acid contains the base sequence $GATGC...$. Which of the following chains is complementary to this sequence?

$ADP$ and $ATP$ differ in the number of

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

In the sugar that differentiates $RNA$ from $DNA$,the presence or absence of the $-OH$ group occurs at which carbon atom?

When $RNA$ is hydrolysed,there is no relationship among the quantities of different bases obtained. What does this fact suggest about the structure of $RNA$?