Which out of the following is not an example of an inducible operon?

The example of Inducible Operon is

A

Lac operon

B

Trp operon

C

Both of these

D

None of the above

Once an operon structure is known ______ for the presence of a promoter and regulatory elements _____ in the operon do not possess such DNA elements.

A

only the first gene is predicted, whereas other genes

B

only the first hundred genes are predicted, whereas next few genes

C

only first two genes are predicted, whereas next few genes

D

only first ten genes are predicted, whereas next few genes

The lac operon is found only in prokaryotes and consists of structural genes and a promoter and operator. Which of the following statements explains why we study the lac operon?

A

It represents a principal means by which gene transcription can be regulated.

B

It explains how baby mammals utilize lactose from their mothers as they nurse.

C

It illustrates how RNA is processed after it is transcribed.

D

It illustrates possible control of the cell cycle and may lead to an understanding of cancer.

If the lac operon of the genome of bacteria is always active it has a defect in which region of the operon?

A

i

B

o

C

Promoter

D

Structural gene

Which operon behaves similar to Bacillus subtilis trp operon in terms of attenuation?

A

Lac operon

B

His operon

C

Phe operon

D

Ara operon

Tryptophan operon in E. coli is a repressible operon.

A

True

B

False

Inducible promoters do not respond to chemicals.

A

True

B

False

In mice you place are protein under an inducible promoter and you insert the gene under study in the loxP flanking region between opposite segments. If this tissue is induced which of the following will you see?

A

There will be no visible result

B

The gene under study will be deleted from specific induced cell

C

The gene under study will be deleted from all other than the induced cell

D

The gene will be inserted in the Cre gene sequence

The promoter used in T7 system is inducible by which of the following?

A

Xylose

B

Galactose

C

Lactose

D

Fructose

The endogenous MMT promoter is inducible by which of the following hormones?

A

Glucocorticoid

B

Insulin

C

Halogenase

D

Amylase

Which out of the following is not an example of an inducible operon?

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