Which one of the following correctly represents the manner of replication of $DNA$?

The smallest unit of genetic material which,when altered,results in a mutation is known as .....

What are informosomes?

Which of the following does not follow the Central Dogma of molecular biology?

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.

In which of the following is the flow of genetic information in the reverse direction?