DNA and replication Flashcards
what makes up DNA
nucleotides
what are nucleotides made up of
deoxyribose sugar, phosphate, and a base
what are the base pairings
adenine and thymine, guanine and cytosine
what is the shape of DNA
anti-parallel double helix
what joins the strands together
week hydrogen bonds
what end of DNA is 3 prime and which is 5 prime
Phosphate- 5’ deoxyribose sugar- 3’
what is the first stage of DNA replication
the DNA unwinds and the hydrogen bonds are broken
what is the second stage of replication
a primer joins to the DNA strands
what is the leading strand and how are nucleotides added to it
the 3’ stand, DNA can be added in a continuous strand
what enzyme is responsible for adding nucleotides to the exposed bases
DNA polymerase
what enzyme joins the chunks of DNA on the lagging stand together
ligase
what is DNA replication considered as because of the fact that the new molecule has one old and one new strand
semi-conservative
