DNA structure 1.1 Flashcards
1
Q
shape of dna
A
double helix
2
Q
how are the nucleotides held together in dna
A
covalent bonds
3
Q
what is a DNA nucleotides composed of
A
deoxyribose sugar, base, phosphate group
4
Q
what is at the 3’ end of a nucleotide
A
deoxyribose sugar
5
Q
what is at the 5’ end of the nucleotide
A
phosphate
6
Q
what kind of bond is between the bases
A
hydrogen bonds.
7
Q
in what direction do the strands run from eachother
A
antiparallel
8
Q
how is DNA organised in prokaryotes
A
circular chromosomes
plasmids
no nucleus
9
Q
how is DNA arranged in eukaryotes
A
linear chromosomes coiled round histone proteins in the nucleus
circular chromosomes in the mitochondria and chromosomes
10
Q
how is DNA arranged in yeast
A
linear chromosomes
plasmids
11
Q
what is the genetic code
A
the base sequence of DNA
