The $DNA$ model was first proposed by .......

Which of the following bases is present in $RNA$ instead of $Thymine$ found in $DNA$?

Assertion : $DNA$ is associated with proteins.
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.

The successive nucleotides of $RNA$ are covalently linked through which of the following bonds?

$A$ distinct mechanism that usually involves a short segment of $DNA$ with remarkable capacity to move from one location in a chromosome to another is called

Match List-$I$ with List-$II$:

List-$I$	List-$II$
$a$. Bacteriophage $\phi \times 174$	$i$. $48502$ base pairs
$b$. Bacteriophage lambda	$ii$. $5386$ nucleotides
$c$. Escherichia coli	$iii$. $3.3 \times 10^9$ base pairs
$d$. Haploid content of human $DNA$	$iv$. $4.6 \times 10^6$ base pairs

Choose the correct answer from the options given below: