$i.$ 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.
$3'ATGCATGCATGCATG5'$ TEMPLATE STRAND
$5' TACGTACGTACGTAC3'$ CODING STRAND