Ch. 3-6
Nucleic Acids
Very large complex organic molecules Store genetic/hereditary information DNA Deoxyribose nucleic acid RNA Ribo nucleic acid Nucleotide Monomer of nucleic acids Phosphate group PO4 Attached to 5th carbon of sugar Negative charge Five carbon sugar Aka pentose In DNA Deoxyribose Deoxy- one less oxygen than in ribose In RNA Ribose Ring-shaped Nitrogen Base Attached to 1st carbon in sugar Purines Double carbon rings Adenine (A) Guanine (G) Pyrimidines Single carbon rings Thymine (T) Found only in DNA Cytosine (C) Uracil (U) Found only in RNA Base-pair rule A+T (only in DNA) A+U (only in RNA) C+G (both DNA and RNA) ATP Adenosine triphosphate Energy molecule Structure RNA adenine nucleotide 2 extra phosphates bonded with a high energy bond(~) 3 phosphates 1 Ribose 1 Adenine ADP Adenosine diphosphate RNA nucleotide 1 extra phosphate bonded with a high energy bond(~) 2 phosphates Ribose Adenine AMP Adenosine Monophosphate RNA nucleotide AMP ~ P ~ P = ADP ~ P = ATP Energy cycle ATP <--> ADP + P + energy
Back to Biology Notes