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What is DNA?

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kody nott

on 26 February 2014

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Transcript of What is DNA?

What is DNA?
DNA is a self-replicating material present in nearly all living organisms as the main constitment of chromosomes. It is the carrier of genetic information.
What does DNA stand for?
Deoxyribonucleic acid
What is a nucleotide?
A compound consisting of a nucleoside linked to a phosphate group. Nucleotides form the basic structual unit of nucleic acids such as DNA
Structure of DNA
Molecular structure of Nucleic Acids
What base pair bonds with what?
Watson-Crick base pairs (guanine-cytosine and adenine-thymine) allow the DNA helix to mainntain a regular helical structure that is independent of its nucleotide seuqnce
Pyrimidines V.s Purines
Nitrogenous bases that make up the two different kinds of nucleotide bases in DNA and RNA. The two-carbon nitrogen ring bases (adenine and guanine) are purines, while the one-carbon nitrogen ring bases (thymine and cytosine) are pyrimidines.
5' V.s 3' ends of DNA (antiparallel)
5' end terminates in a phosphate group and the 3' end terminates in a sugar molecule
Compare DNA V.s RNA
The main difference between DNA and RNA is the sugar present in the molecules. While the sugar present in an RNA molecule is ribose, the sugar present in a molecule of DNA is deoxyribose. Deoxyribose is the same as ribose, except that the former has one or more OH.
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