What are informosomes?

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

List-$I$	List-$II$
$A$. Monocistronic gene	$I$. Coding sequence
$B$. Polycistronic gene	$II$. Intervening sequence
$C$. Exons	$III$. Mostly prokaryotes
$D$. Introns	$IV$. Mostly eukaryotes

How many of the given statements $(i-iv)$ is/are correct?
$i.$ In transcription,adenosine pairs with uracil.
$ii.$ Regulation of lac operon by repressor is referred to as positive regulation.
$iii.$ The human genome has approximately $50,000$ genes.
$iv.$ Haemophilia is a sex-linked recessive disease.

Which of the following is used as a screening agent in the replica plating experiment?

Which of the following is $NOT$ associated with the study of genetics?

Match the enzymes in List-$I$ with their functions in List-$II$:

List-$I$	List-$II$
$(a)$ Helicase	$(i)$ $DNA$-dependent $DNA$ synthesis
$(b)$ Ribonuclease	$(ii)$ Digestion of $RNA$
$(c)$ Reverse transcriptase	$(iii)$ Breaking hydrogen bonds between $DNA$ strands
$(d)$ $DNA$ polymerase	$(iv)$ $RNA$-dependent $DNA$ synthesis