chapter 16--replication Flashcards
anitparallel
DNA strands running in opposite directions
purine and pyrimidine
nitrogenous bases that pair together in DNA and RNA
purines
adenine and guanine
pyrimidines
thymine, uracil, and cytosine
hydrogen bonds
bonds that keep two strands of DNA together; must be broken for DNA
deoxyribose and ribose
the sugars that make up the backbones of DNA and RNA respectively
histones
proteins that DNA winds winds around; they have a slight positive charge
helicase
enzyme that untwists the DNA helix at the replication fork
origin of replication
the site where DNA replication begins
replication fork
y-shaped end of the replication bubble
single stranded binding proteins
proteins that bind to and stabilize the single stranded DNA
topoismerase
enzyme that unwinds the DNA helix ahead of the replication fork
DNA polymerase I
enzyme responsible for replacing RNA primers with DNA
DNA polymerase III
enzyme responsible for elongating the new DNA strand
leading strand
the strand of DNA that is synthesized continuously