In the lactose operon of Escherichia coli, what is the function of promoter
Binding of Gyrase enzyme
Binding of $RNA$ polymerase
Codes for $RNA$ polymerase
Processing of messenger $RNA$
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.
'Operon model' for gene regulation in bacteria was proposed by
Lactose operon produces enzymes
Jacob and Monad studied lactose metabolism in E. coli and proposed operon concept, which is applicable for
$A$ : Lac operon exerts negative control only.
$R$ : The operator is occupied by aporepressor during regulation