DNA structure
DNA in chromosomes
DNA structure
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double stranded DNA has two strands
A phosphate-deoxyribose polymer composes the backbone of the DNA
adjacent sugars are connected by phosphodiester bonds
nitrogenous bases are convalently bonded to the 1' carbon of the deoxyribose
the two DNA strands are antiparallel
the two strands are held together by hydrogen bonds between complementary bases
adenine hydrogen bonds (base pairs) to thymine
guanine hydrogen bonds to cytosine
When DNA replicates two idential DNA double helices are formed
