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Assertion :- Regulation of lac opernon b...

Assertion :- Regulation of lac opernon by repressor is referred to as positive resultion.
Reason : Refulation of lac opernon can also be visualised as regulation of enzyme synthesis by its product.

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:
D
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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.

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.

Read following statements (1-4). 1. In transcriptoin, adenine pairs with uracil. 2. Regulation of lac operon by repressor is referred to as positive regulation. 3. The human genome has approximately 50,000 genes. 4. Haemophilia is a sex - linked recessive disease. How many of the above statements are right ?

Read the following four statements (A-D) ltbr gt In transcription, adenosine pair uracil Regulation of lac operon by repressor is refferred to as positive regulation The human genome has approximately 50,000 genes ltbr gt Haemophilia is sex - linked recessive disease How many of the above statements are right

How many of these statements are correct ? (i) In transcription , adenosine pairs with uracil. (ii) Regulation of lac operon by a repressor is referred to as positive regulation . (iii) The human genome has approximately 50,000 genes. (iv) DNA fingerprinting utilizes VNTRs and RFLP.

Read statements a-d . (a) In transcription, adenosine pairs with uracil (b) Regulation of lac operon by repressor is positive regulation (c) Human genome has approximate 50,000 genes (d) Haemophilia is sex-linked recessive disease How many of above statement are correct ?

Assertion :- Lac opertor is present only in lac operon & it interact specifically with lac repressor only. Reason : Each operon has its specific operator & specific repressor.

Assertion :- In lac operon, a polycistronic structural gene is regulated by a common promoter & regulatory genes. Reason : Such arrangement is very common in bacteria & is referred as operon.

MOTION-MOLECULAR BASIS OF INHERITANCE-EXERCISE - 4 (ASSERTION & REASON)
  1. Assertion :- t RNAs are specific for each amino acid but there are no ...

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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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