Which of the following is correct for Watson and Crick's model of $DNA$. It is duplex with
$10$ base pairs and $34\;\mathring A$ A distance for every turn.
$10$ base pairs and $3.4 \;\mathring A$ distance for each turn of spiral.
$20$ base pairs and $34 \;\mathring A$ for each turn.
None of the above
The substance that acts as connecting link between two generations is
Adjacent nucleotides in a polynucleotide chain are joined by
Uridine is formed when pyrimidine nitrogen base uracil joins with
The reason for double helical structure of $DNA$ is operation of
Cytidine is a