Wild type E.coli cells are growing in normal medium with glucose. They are transferred to a medium c

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5.Molecular Basis of Inheritance

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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

The lac-Operon is repressed

All Operons are induced

E. coli cells stop dividing

The lac-Operon is induced

(AIPMT-1995)

Solution

(d)Lac operon : cluster of genes that regulates production of enzymes needed to metabolize lactose in bacterial cells $(E. coli)$. It is an inducible operon.

Standard 12

Biology

Define an operon, giving an example, explain an Inducible operon.

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$A$ : Single $DNA$ dependent $RNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.
$R$ : Structural genes in bacteria are monocistronic.

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Operon is

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Which of the following would you expect to find in an inducible system?

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Which enzyme will be produced in a cell if there is a nonsense mutation in the lac $Y$ gene?

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(NEET-2013)

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

Solution

Similar Questions

Define an operon, giving an example, explain an Inducible operon.

$A$ : Single $DNA$ dependent $RNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria. $R$ : Structural genes in bacteria are monocistronic.

Operon is

Which of the following would you expect to find in an inducible system?

Which enzyme will be produced in a cell if there is a nonsense mutation in the lac $Y$ gene?

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$A$ : Single $DNA$ dependent $RNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.
$R$ : Structural genes in bacteria are monocistronic.