Q DNA replication
Antiparallel strands
One copy of a DNA molecule will replicate itself to make two identical copies of the molecule.
Ab
1. The DNA molecule "un-zips" with the help of a protein, called Helicase. Helicase breaks the hydrogen bonds.

2. Complementary base
?
occurs. Nucleotides move into position to bond with the existing DNA single
strands.
A.
ce
is
3. The protein, polymerases checks for mistakes and joins the deoxyribose
of
and phosphates in the backbone of the new strands.
Mutations
ht
Mutations can occur naturally or
a
1.
occurring mutations occur by
a) nitrogen base
b) nitrogen base
c) nitrogen base
Any of these mutations change the entire amino acid
of the protein, so
of protein are altered. This can lead to serious consequences.
D
and
W
2. Environmental mutations
a) caused by
> V)

PLEASE HELP ILL BRAINLIEST YOU PLEASE