dna
Post on 03-Jul-2015
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Made by; kush sehgal…class xi science
r.no. 29
Stores genetic information to build and maintain a living organism
Copies itself2
Determined the three-dimensional structure of DNA
One of the greatest discoveries in the history of science
Nobel prize in 1962
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Deoxyribose
Phosphate
Base =
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Deoxyribose
Phosphate
Base
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Adenine pairs with Thymine
Guanine pairs with Cytosine
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Total length of DNA in each cell is about 6 feet
Wraps around proteins called histones
Over 3 billion nucleotide pairs in human DNA!
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DNA strands separate
DNA nucleotides attach to
each strand
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Replication is not 100% accurateErrors occur when copying DNA
DNA damagedUltraviolet lightX-raysCigarette smokeNitrates (smoked meat)Pesticides & Herbicides
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