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How does beta-galactosidase coding seque...

How does `beta`-galactosidase coding sequence act as a selectable marker ? Why is it a preferred selectable marker to antibiotic resistance genes ? Explain.

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Assertion (A): B-galactosidase coding sequence act as a selectable marker. Reason (R) : Enzyme galactosidase converts the galactose into lactose.

Selectable marker gene among the following is

What is a 'marker gene' ? Mention two common selectable markers.

(a) Name the selectable markers in the cloning vector pBR322 ? Mention the role they play. (b) Why is the coding sequence of an enzyme b-galactosidase a preferred selectable marker in comparison to the ones named above ?

Genes for which of the following can serve as selectable marker ?

Explain the importance of 'selectable marker' with the help of suitable example.

Which of the following is the first artificial cloning vector that has two selectable markers—tetracycline (tetR) and antibiotic restriction enzymes (ampR)?

In cloning vector pBR322, the Barn HI cloning site is found in which selectable marker gene?

XII BOARDS PREVIOUS YEAR-XII BOARDS-Section C
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  3. Describe the roles of (a) high temperature, (b) primers, and (c ) bact...

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  4. How does beta-galactosidase coding sequence act as a selectable marker...

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  5. Answer the following questions based on Meselson and Stahl's experime...

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  6. Explain the steps in the formation of an ovum from an oogonium in huma...

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  7. a) Explain "birth rate" in a population by taking a suitable example. ...

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  8. a) Explain DNA polymorphism as the basis of genetic mapping of human g...

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  9. a) Explain "death rate" in a population by taking a suitable example. ...

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  10. Explain any three advantages the seeds offer to angiosperms.

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  11. Name and explain the role of inner and middle walls of the human uteru...

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  12. A color-blind child is born to a normal couple. Work out a cross to sh...

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  13. Mendel published his work on inheritance of characters in 1865, but is...

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  14. Women are often blamed for producing female children. Consequently, th...

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  15. a) Name the tropical sugar cane variety grown in South India. How has ...

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  16. Why are beehives kept in crop field during flowering period? Name any ...

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  17. How does RNA interference help in developing resistance in tobacco pla...

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  18. Study the graph given below and answer the questions that follow: ...

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  19. i) What is primary productivity? Why does it vary in different types o...

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  20. A cross between a normal couple resulted in a son who was haemophilic ...

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