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Restriction endonucleases are...

Restriction endonucleases are

A

Used in genetic engineering for ligating two DNA molecules

B

Used for in vitro DNA synthesis

C

Synthesised by bacteria as part of their deense mechanism

D

Present in mammalian cell for degradation of DNA when the cell dies

Text Solution

Verified by Experts

The correct Answer is:
C
In the bacterial cell, restriction endonuclease recognise and cleaves foreign DNA, thus eliminating infecting organisms.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-BIOTECHNOLOGY : PRINCIPLES AND PROCESSES-MCQs
  1. A gene whose expression helps to indentify transformed cell is known a...

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  2. The DNA fragments separated on an agarose gel can be visualised after ...

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  3. Restriction endonucleases are

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  4. Which of the following restriction enzymes produces blunt ends

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  5. Which of the following is not a component of downstream processing

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  6. A foreign DNA and plasmid cut by the same restriction endonuclease can...

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  7. Stirred-tank bioreactors have been designed for

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  8. Which of the following is a resctriction endonucleus?

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  9. The taq polymerase enzyme is obtained from

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  10. Which of the following is not a feature of the plasmids ?

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  11. The DNA molecule to which the gene of interst is integrated for clonin...

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  12. The cutting of DNA at specific locations became possible with the disc...

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  13. Which vector can clone only a small fragment of DNA ?

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  14. DNA fragments generated by restriction endonucleases in a chemical rea...

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  15. The colonies of recombinant bacteria appear white in contrast to blue ...

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  16. Which one of the following represents a palindromic sequence in DNA?

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  17. The figures below shows three steps (A,B,C) of polymerase chain reacti...

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  18. Biolistics (gene-gun) is suitable for

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  19. For transformation, micro-particles coated with DNA to be bombarded fr...

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  20. PCR and restriction Fragements length Polymorphism are the methods for

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