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TOPIC ...(Genetics ) Class X -BIOLOGY

19/01/2017 1 0

DNA as genetic material-DNA (Deoxyribo nucleic acid )and RNA (Ribonucleic acid )are two major types of nucleic acid found in cells .Chemical composition of nucleic acids ....Sugar ;phosphate group;and Nitrogen bases .

Pentose sugar + Nitogen Base = Nucleoside

Pentose sugar + Nitrogen Base + Phosphate = Nucleotide

STUCTURE OF DNA -----

According to Watson and Crick

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