Which of the following switch off lac operon

  • [AIIMS 2019]
  • A

    Structural gene

  • B

    Regulator gene

  • C

    Operator gene

  • D

    Promoter gene

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Repressor protein is formed from

Wild type E.coli cells are growing in normal medium with glucose. They are transferred to a medium containing only lactose as the sugar. Which one of the following changes take place

  • [AIPMT 1995]

In the lactose operon of Escherichia coli, what is the function of promoter

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.

The lactose present in the growth medium of bacteria is transported to the cell by the action of

  • [NEET 2024]