DNA structure Flashcards
1
Q
double helix
A
two strands of DNA coiled
2
Q
pentose sugar
A
sugar with 5 carbon edges
3
Q
deoxyribose sugar
A
the sugar in the nucleotides of DNA
4
Q
phosphodiester bonds
A
bond deoxyribose and the phosphate group
5
Q
most DNA has a
A
right hand twist
6
Q
left twisted DNA is called
A
Zdna or southpaw DNA
7
Q
Hot spots in DNA occur when
A
right twist and left twist DNA meets producing mutations
8
Q
antiparallel strands
A
one strand goes from 5’ (phosphate) to 3’ (sugar) while the other goes 3’ (sugar) to 5’ (phosphate)
9
Q
double ring purines
A
A and G
10
Q
single ring pyramidines
A
T and C
11
Q
purines pair with
A
pyramidines
12
Q
how many hydrogen bonds do each base pair need?
A
AT need 2 while GC need 3
