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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