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Discuss with your teacher and find out h...

Discuss with your teacher and find out how to distinguish between the following:
(a) plasmid DNA and Chromosomal DNA
(b) RNA and DNA
( c) Exonuclease and Endonuclease.

Text Solution

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(i) Plasmid DNA and Chromosomal DNA: Plasmid DNA is a small double stranded circular DNA present in some bacteria. They carry genes for drug resistance, `N_(2)` fixation and fertility. The chromosomal DNA is much larger in size and carries genes for other traits of the cell. (ii) RNA and DNA: RNA is a single stranded polymer of ribonucleotides, which contain ribose sugar and adenine, guanine cytosine and uracil nitrogenous bases, whereas DNA is a double standed polymer of deoxyribo-nucleotides containing deoxyribose suger and adenine, guanine, cytosine and thymine nitrogenous bases. (iii) Exonuclease and Endonuclease: Exonclease remove nucleotides from the ends of DNA, whereas endonucleases make cuts at specific positions within the DNA.
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