Download Notes on DNA

DNA-Deoxyribonucleic acid
-Very long molecule, but
really quite simpleAll living
things are
made of
cells and all
cells have
DNA
DNA is the
“Blue print” or
map to make a
new cell.
DNA looks like a twisted ladder
(double helix)
DNA is made
of a sugar, a
phosphate,
and a base
(these three
things
together are
called a
“nucleotide”)
These are
the 4 Bases
Adenine-A
Thymine-T
Guanine-G
Cytosine-C
“A” goes with “T” and “G” goes
with “C”
When the DNA molecule is folded back
and looped up (packaged up like
clothes in a suitcase) it is called a
“Chromosome”
Chromosomes
are in the
nucleus of
Eukaryote (more
complex) cells
and look like
little strings.
Humans have 46
Chromosomes in
all cells.
Prokaryotes
(simple cells like
bacteria) have
no nucleus or
chromosomes, so
the DNA is just
spread around in
the cell.