DNA Replication

Question 1

Unzipping of DNA by DNA helical

Answer 1

DNA helicase unzips DNA
Breaks hydrogen bonds between complementary bases
Many separation points along chromosome, replication fork
Exposes 2 DNA strands

Question 2

Free DNA nucleotides pair with exposed bases on each polynucleotide strand

Answer 2

Free DNA nucleotides are attracted to exposed bases
Hydrogen bonds form
Original DNA= template strand

Question 3

New nucleotides bond together

Answer 3

DNA polymerase links DNA nucleotides together
Form phosphodiester bonds between sugars and phosphates
DNA replication= semi conservative
POlymerase only adds nucleotides from 5 to 3

Question 4

Genetic code

Answer 4

Protein language= 20 letters
20 different amino acid makes up proteins
3 bases code for 1 amino acid, 64 amino acid code for more than enough
Each amino acid is degenerate
Non overlapping