dna structure Flashcards
1
Q
purine bases
A
a, g
2
Q
pyrimedine bases
A
t,c,u
3
Q
transcription
A
dna-> rna
4
Q
translation
A
rna-> protien
5
Q
what type of bond exists between the sugars in the dna backbone
A
phosphodiester
6
Q
nucleic acids have a 3’ and 5’ end which means ..
A
they have structural polarity
7
Q
what type of bond forms between bases
A
hydrogen
8
Q
how many hydrogen bonds between a-t
A
2
9
Q
how many hydrogen bonds between c-g
A
3
10
Q
what are codons
A
the three leters of the base pairs
-correspond to a specific amino acid
11
Q
nucleasome
A
dna ditly packed around histone proteins
12
Q
chromosome
A
densly packed dna
13
Q
how does dna structure contrast protein structure
A
dna has 4 bases, protein 20
bases project in, r groups project out
proteins can be non helixs but dna is always double stranded
