DNA Structure

DNA = deoxyribonucleic acid

Polymer of nucleotides:

Sugar -- deoxyribose

Phosphate

Nitrogenous base

A, T, G, C

Complementary base pairing

DNA replication

RNA = ribonucleic acid

Polymer of nucleotides:

Sugar -- ribose

Phosphate

Nitrogenous base

A, U, G, C

Three forms:

mRNA

rRNA

tRNA

Genetic code

Triplet of bases (= codon) code for amino acid