Studied by 0 peopleDNA is composed of…
4 types of nucleotides
DNA is a long _____ composed of ________ called nucleotides
polymer, monomers
Each nucleotide as _____ parts
3
What are the three parts?
Phosphate group, deoxyribose, nitrogen-containing base
How did Erwin Chargaff change thinking?
By analyzing the DNA in different organisms
All DNA found in any organism has…
the same 4 bases
What was different about the 4 bases from organism to organism?
The proportions
A+,C+
t, g
what is Chargaff’s Rule?
A=T, C=G
Who developed accurate model of DNA’s 3-dimentional structure?
Watson and Crick
Who were the first scientists to suggest the DNA had a helical shape?
Rosalind Franklin and Maurice Wilkins
DNA is a…
Double Helix
DNA strands are…
complimentary
Nucleotides always pair in…
the same way
Covalant bonds connect…
the sugar of one nucleotide to the phosphate of another
Note 
Flashcard (95)