______________________ Nucleic acids: ______________________ 2006-2007

Nucleic Acids Examples ____________ DeoxyriboNucleic Acid

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

Genes (DNA) are needed to run bodies every day… C G Genes (DNA) are needed to run bodies every day… to make you and me… to make new cells… to make babies!

Nucleic acids _______________________ Building block = nucleotide – nucleotide – nucleotide – nucleotide _______________________ different nitrogen bases ____________________ Nitrogen bases I’m the A,T,C,G or U part! phosphate sugar N base

Nucleotide chains Nucleic acids nucleotides chained into a polymer phosphate sugar N base Nucleotide chains Nucleic acids nucleotides chained into a polymer _________________ ________________ phosphate sugar N base phosphate sugar N base phosphate sugar N base RNA

DNA Double strand twists into a double helix _______________ between nitrogen bases join the 2 strands ___________________ A :: T C :: G the two strands can easily separate when our cells need to make copies of it _____________ It’s a helix or B sheet within a single region. Can have both in one protein but a specific region is one or another

Copying DNA _____________________ copy DNA 2 strands of DNA helix are _______________________ 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?

Newly copied strands of DNA DNA replication Copying DNA pairing of the bases allows each strand to serve as a pattern for a new strand The greatest understatement in biology! Newly copied strands of DNA

Watson and Crick … and others… 1953 | 1962 Watson and Crick … and others…

HELIXHELIX Let’s build some DNA!