Information molecules

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Presentation transcript:

Information molecules Mr. Bliss 2014 - 2015 Nucleic acids: Information molecules

Nucleic Acids Examples DNA DeoxyriboNucleic Acid RNA RiboNucleic Acid

Nucleic Acids Function: genetic material stores information genes blueprint for building proteins DNA  RNA  proteins transfers information blueprint for new cells blueprint for next generation DNA proteins

DNA is a Polymer

RNA is a polymer too

Nucleotides (monomer)

Nucleotides 1 of 5, actually!

Sugar-Phosphate backbone

Nitrogenous Bases

Nucleotide chains Nucleic acids double-sided double helix A, C, G, T phosphate sugar N base Nucleotide chains phosphate sugar N base Nucleic acids nucleotides chained into a polymer DNA double-sided double helix A, C, G, T RNA single-sided A, C, G, U strong bonds phosphate sugar N base phosphate sugar N base RNA

Nitrogenous Bases Uracil U

Copying DNA Replication copy DNA 2 strands of DNA helix are complementary they are matching have one, can build other have one, can rebuild the whole when cells divide, they must duplicate DNA exactly for the new “daughter” cells Why is this a good system?

Watson and Crick … and others… 1953 | 1962

Rosalind Franklin Worked in the same building as Watson and Crick Her X-Ray Crystallography work was shown to Watson without her knowledge Died in 1958 of ovarian cancer due to exposure to X-ray radiation

Let’s build some DNA!