dna replication

Question 1

3 enzymes and function for dna replication

Answer 1

1. H bonds break apart bases using DNA HELICASE
2. each polynucleotide used as template as new mononucleotides line up and form phosphodiester bonds using DNA POLYMERASE
3. new full dna molecules reform phosphodiester and H bonds and twist into double helix using DNA LIGASE

Question 2

How is DNA read and how is it synthesized

Answer 2

read = 3 to 5

RNA and DNA synthesized = 5 to 3

Question 3

what is semi conservitve replication

Answer 3

-original double helix unzipped and seperated

-both parent strands from original DNA molecules are used as template for new strands

-newly synthesized DNA contains one parent strand and one new complementry strand

Question 4

why use a triplet code?

Answer 4

• only 4 types of bases

-there are 20 necessary amino acids

-3 bases is the minimum number that provides enough combinations to code for each amino acid

Question 5

START BASE AND END BASE

Answer 5

start = TAC

end = UAA , UAG , UGA