AND ANSWERS BREAKDOWN
double helix
determined by watson and crick; structure of DNA
nucleotide
sub unit of nucleic acid (monomer) made of 5 carbon sugar, phosphate, nitrogenous base
adenine
purine that pairs with thymine
thymine
pyrimidine (single ring) that pairs with adenine
guanine
double ring; purine; that pairs with cytosine
cytosine
single ring base, pyrimidine, that pairs with guanine
antiparallel
DNA strands run in opposite directions
5' end
phosphate group exposed
3' end
sugar exposed
replication fork
where DNA strands separate for replication
DNA topoisomerase
cuts and rejoins helix
DNA polymerase
adds DNA to 3' end
helicase