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Assertion :- The gene I codes for the re...

Assertion :- The gene I codes for the repressor of the lac operon.
Reason : The y-gene codes for permease, which increases permeability of the cell to `beta`-galactosidase.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

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The correct Answer is:
C
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Read the following statements for lac operon: i. Each operon has its specific operator and specific repressor. ii. The y gene codes permease, which increases the permeability of the cell to beta-galactosides. iii. Regulation of lac operon can be visualized as regulation of enzyme synthesis by its substrate. Select the option with the correct statements.

In lac operon system lac-I-gene codes for :

In lac operon,the regulator gene codes for

In lac operon i gene codes for :

In lac operon system, lac gene-i codes for

In lac operon system, lac gene-Z codes for

In lac operon genes a, i, y and z code for

A gene of operon which forms the repressor protein is

Read the following statements w.r.t. lac operon. Br a. lac-i is the constitutive gene. Br b. lac-y codes for permease to increase permeability of cell to Beta -galactoside. Br c. Lactose is the substrate for the enzyme B- galactosidase and it regulates switching on and off of the operon. br d. Regulation of lac operan can be also visualised as regulation of enzyme synthesis by its substrate.

MOTION-MOLECULAR BASIS OF INHERITANCE-EXERCISE - 4 (ASSERTION & REASON)
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  2. Assertion :- Inhibition of transcription is the only method of regula...

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  3. Assertion :- In lac operon, a polycistronic structural gene is regulat...

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  4. Assertion :- The gene I codes for the repressor of the lac operon. R...

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  5. Assertion :- Lactose is the substrate for the enzyme beta-galactosidse...

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  6. Assertion :- Inhibition of transcription is the only method of regula...

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  7. Assertion :- Lac opertor is present only in lac operon & it interact s...

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  8. Assertion :- Gene regulation in prokaryotes is comparatively simple th...

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  9. Assertion :- In lac operon, a polycistronic structural gene is regulat...

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  10. Assertion :- The gene I codes for the repressor of the lac operon. R...

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  11. Assertion :- Lactose is the substrate for the enzyme beta-galactosidse...

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  12. Assertion :- Regulation of lac opernon by repressor is referred to as ...

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  13. Assertion :- HGP was closely associated with the rapid development of ...

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  14. Assertion :-BAC & YAC are the common vectors used in HGP. Reason : I...

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  15. Assertion :- DNA fingerprinting is a very quick way to compare the DNA...

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  16. Assertion :- The repetitive DNA are separted from bulk genomic DNA as ...

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  17. Assertion :- DNA fingerprinting involves identifying differences in so...

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  18. Assertion :- The probability of DNA polymorphism would be higher in no...

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  19. Assertion :- The VNTR belongs to a class of satellite DNA referred to...

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  20. Assertion :- The senstivity of fingerprinting technique has been incre...

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