When did Watson and Crick propose the $DNA$ double helix model?

Which type of nitrogenous bases are found in the loops of $t-RNA$?

The similarity between $DNA$ and $RNA$ is that both are

The two strands of the $DNA$ structure are:

Identify the correct sequence of packaging structures from $DNA$ to chromosome.

In a double-stranded $DNA$,the sequence of base pairs in one strand is $AGCTAAGCC$. What is the complementary sequence on the other strand?