The basics of DNA

BASES
Toatttached
phosphate to C3
attached
to




SEQUENCES Cs 3 direction
AGTTGCACG is shorthand for
S AGTTGCACG 3
senselcoding strand
3 TCAACGTGC S nonsenseltemplate strand

, R NA S A G UU G CA C G 3


DN A
packaging
Human 46 chromosomes
genome
2 m of DNA per cell


chromatin H itches
H 1 higher folding

Chromatin modifications
Affect
gene expression
can be passed onto cats
daughter epigenetics

REPLICATION
Un helix 2
Stages l winding of Building
strand in S 3 direction from
complementary
each strand 3 Join fragments on the
lagging
strand
DNA act as a template
for its own replication
semi conservative
replication Each
daughter strand contain
one conserved strand and one new strand