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The lac operon consists of :...

The lac operon consists of :

A

Four regulatory genes only

B

One regulatory gene and three structural genes

C

Two regulatory genes and two structural genes

D

Three regulatory genes and three structural genes

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The correct Answer is:
B
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USHA PUBLICATION-MOLECULAR BASIS OF INHERITANCE-EXERCISE
  1. The smallest part of gene is called as

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  2. In 1869 , discovered the DNA .

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  3. The lac operon consists of :

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  4. In Lac operon , i gene codes for :

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  5. Which one of the following has dual functions ? It codes for methionin...

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  6. Purines possess nitrogen at :

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  7. Mobile genetic sequence are called :

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  8. The portion of DNA which contains information for an entire polypeptid...

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  9. The place where RNA - polymerase attaches with the DNA is called :

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  10. RNA directs the building of proteins through a sequence of :

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  11. Choose the correct option : 1) Six codons do not code for any amino ac...

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  12. The unequivocal proof of DNA as the genetic material came from the stu...

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  13. DNA contains nucleobasės , sugars and phosphate . Removal of which amo...

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  14. Removal of introns and joining the exons in a definite order in a tran...

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  15. The enzyme referred to as Kornberg enzyme is

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  16. Which one of the following is not a part of a transcription unit in DN...

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  17. Which enzyme joins DNA fragments ?

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  18. A single strand of nucleic acid tagged with a radioactive molecule is ...

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  19. Which one is a true statement regarding DNA polymerase used in PCR ?

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  20. If one strand of DNA has the nitrogenous base sequence as ATCTG , what...

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