Enzymes
the function of a helicase
unzips DNA by breaking the hydrogen bonds
Is DNA a parallel or anti-parallel structure
anti-parallel
allow DNA polymerase to synthesize the lagging strand in sagments
the function of primase
lays down RNA primer, which gives a template of where DNA Polymerase needs to copy
What are purines
2 ring compounds. A and G
leading strand direction
adds nucleotides in the 5' to 3' direction
the function of ligase
binds together Okazaki Fragments to form new bonds on backbone
What are pyrimidines
single ring compounds. C and T
lagging strand direction
3' to 5' direction adding nucleotides backwards
the function of DNA polymerase
reads single strand of DNA and synthesizes a new strand
What are the 4 bases in DNA, and which ones bond to each other
Adenine, Thymine, Guanine, Cytosine.
C is tripple bonded to G
A is double bonded to T
single-strand binding proteins
order of enzymes involved
Helicase --> Primase --> DNA Polymerase --> Ligase
How many polynucleotides does DNA contain
two
what are telomeres
short DNA sequences that repeat many times