1.1 DNA contains genetic information
that codes for growth and
development. They are coiled up
so they can fit into a small space.
Contains genes that code for a
2.1 Made up of many nucleotides.
2.2 Made from a
deoxyribose sugar, a
phosphate and a
2.3 A-T (purine),
3 Double helix
join together to
form a poly
3.2 The sugar and
join to make a
3.3 Two DNA polynucleotides join together
anti parallel by forming hydrogen bonds
between them. 2 H-bonds between A-T, 3
H-bonds between C-G.
4.1 Protein synthesis
4.1.1 DNA carries the intructions to make
proteins as genes. The organelles that
make proteins are in the cytoplasm. DNA
is too big to pass through the nuclear
pores. DNA copies into RNA. RNA leaves
the nucleus and joins to a ribosome where
it can synthesis a protein.
4.2 Has a ribose sugar,
strand, and uracil
instead of thymine.
5 Self replication
5.1 Hydrogen bonds between the two polynucleotides break. The helix
unzips itself to form two single strands. Each strands acts as a template.
Free floating DNA joins the exposed bases by complementary base
pairing. The nucleotides are joined together by the enzyme polymerase.
Hydrogen bonds form between the bases on the original and new
strand. Each new DNA molecule contains one strand from the original
and one new one. Called semi conservative replication
6.1 A sequence of DNA nucleotides that
codes for a protein. They determine
the order of the amino acids. Each
amino acid is coded from three
bases in a gene