Biochemistry: Macromolecules Part 3

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Presentation transcript:

Biochemistry: Macromolecules Part 3 AP Biology Biochemistry: Macromolecules Part 3

DNA vs. RNA nucleotides Remember, DNA is long term; RNA is temporary

Nucleic Acids (DNA)

Nucleic Acids (RNA)

Nucleotides

Complimentary Base Pairing

See the HYDROGEN bonds? Remember, these are very important bonds.

Nucleotide sequence is important! Remember, DNA will make proteins.

Dehydration and Hydrolysis Reactions Short polymer Unlinked monomer Dehydration removes a water molecule, forming a new bond Longer polymer Dehydration reaction in the synthesis of a polymer Hydrolysis adds a water molecule, breaking a bond Hydrolysis of a polymer

5th Carbon of the Sugar holds the phosphate 5th Carbon of the Sugar holds the phosphate. 3rd Carbon is the open bond. Phosphate of the next nucleotide bonds at the 3rd carbon.

Phosphodiester Bonds of Nucleic Acids New strand 5¢ end Sugar Base Phosphate 3¢ end Nucleoside triphosphate

DNA Double Helix Structure

Watson and Crick

Blueprint vs. Protective Cap DNA Double Strand: ____________________________________ ______ Important “Blueprint” sequence ______ Protective “cap” sequence

Genes and Evolution

The Phosphorus Cycle and Nucleic Acids and ATP Rain Geologic uplift Weathering of rocks Plants Runoff Consumption Sedimentation Plant uptake of PO43– Soil Leaching Decomposition