Class 12th Biology 2013 Set1 Delhi Board Paper Solution
Question 15
Expand the following and mention one application of each:
Expand the following and mention one application of each:
(i) PCR
(ii) ELISA
OR (a) Mention the difference in the mode of action of exonuclease and endonuclease.
(b) How does restriction endonuclease function?
Answer
(i) PCR - Polymerase Chain Reaction
(ii) ELISA - Enzyme linked Immuno sorbent Assay.
OR
(a) Exonuclease - cuts the DNA at free ends.
Endonuclease - cuts within DNA segment
(b) Resticriction endonuclease, : cuts within the DNA, at specific sites called pallindromic sites.
e.g. Eco R1 cuts the DNA at following pallindromic sequences.
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5' G A A T T C 3'
3' C T T A A G 5'
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