stucture of dna
Storing info--Take info and
convert it into organism’s
characteristics
2. Copying--Be easily copied
3. Transmitting--Carry info from
one generation to next
what is the three structures of DNA?
Edwin Charaff
What is discovered strange proportion of nucleotides in DNA
Single, circular DNA molecule
in cytoplasm
▪ Called a chromosome
what is prokaryotes
DNA is packaged with__proteins into a
structure called__
What is histone and chromatin
dna polymerase
builds new strand on parental template polymerization(joining) of bases laid dowin in base paring
nucleotide
What is the basic unit of DNA
% guanine (G) ≈ % cytosine (C)
% adenine (A) ≈ % thymine (T)
What is true for all species
DNA is in chromosomes in
nucleus
▪ Number of chromosomes
varies by species
What is Eukaryotes?
each strand of dna helix
has all info needed to
reconstruct other half using base pairing
2nd polymerase
are then proofread by a second dna polymeaserse to earse mistakes
N-base (A, T, C, G)
●5 carbon sugar
●Phosphate group
What is what nucleotide is made up of?
Rosalind Franklin
what is
X ray diffraction pictures of
DNA
□Pictures suggested that
the structure was a helix, and 2
stranded, with N-bases toward
center
1000 fold
what is dna is long often must be folded 1000 fold to fit into cell
strand of dna are said to be
complementary
Upright posts are...
what is equal to sugar phosphate group
study Franklin’s X ray
pictures → they figure out structure within
months and create model explaining structure
and properties of DNA
who is Waston and Crick
repliction
dna duplication
Rungs are equal to
What is Bases hooked by H bonds
helicase
unzips Dna by breaking H-bonds bewtween base pairs