Class 12 Biology - Chapter Biotechnology Principles and Process NCERT Solutions | Do eukaryotic cells have restriction end
Do eukaryotic cells have restriction endonucleases? Justify your answer.
No, eukaryotic cells do not have restriction endonucleases. This is because the DNA of eukaryotes is highly methylated by a modification enzyme, called methylase. Methylation protects the DNA from the activity of restriction enzymes .These enzymes are present in prokaryotic cells where they help prevent the invasion of DNA by virus.
More Questions From Class 12 Biology - Chapter Biotechnology Principles and Process
- Q:- Can you list 10 recombinant proteins which are used in medical practice? Find out where they are used as therapeutics (use the internet).
- Q:- What would be the molar concentration of human DNA in a human cell? Consult your teacher.
- Q:- Describe briefly the followings:
(a) Origin of replication
(b) Bioreactors
(c) Downstream processing - Q:- Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors have over shake flasks?
- Q:- Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker?
- Q:- Explain briefly
(a) PCR
(b) Restriction enzymes and DNA
(c) Chitinase - Q:- From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size? How did you know?
- Q:- Discuss with your teacher and find out how to distinguish between
(a) Plasmid DNA and chromosomal DNA
(b) RNA and DNA
(c) Exonuclease and Endonuclease - Q:- Collect 5 examples of palindromic DNA sequences by consulting your teacher. Better try to create a palindromic sequence by following base-pair rules.
- Q:- Make a chart (with diagrammatic representation) showing a restriction enzyme, the substrate DNA on which it acts, the site at which it cuts DNA and the product it produces.
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4 Comment(s) on this Question
are u tonight....i wanna cum inside u adriana
so what about apn1 isolated from yeast and topoisomarase in our DNA .so i think ans is yes ,euk... have endo.....
I am not happy with the answer.... like I am nt sure abt it
This is not true. Some eukaryotic organisms, for example yeasts, have restriction enzymes to protect their DNA from environmental damege. Even humans have some.
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