DNA replication

Question 1

What is the name given to the method of copying when two polynucleotide chains act as a template to create two identical structures?

Answer 1

semi-conservative replication

Question 2

Where does semi-conservative replication take place?

Answer 2

before cell division (meiosis and mitosis)

Question 3

How do the two strands separate?

Answer 3

H bonds are broken between complimentary bases by DNA helicase

Question 4

What enzyme links the sugar and phosphate groups of nucleotides?

Answer 4

DNA polymerase

Question 5

What is the process of semi-conservative replication?

Answer 5

-DNA unwinds as H bonds between complimentary bases are broken by DNA helicase
-DNA molecule separates into 2 strands
-both strands act as a template which free nucleotides attach to by complimentary base pairs
-nucleotides join together through condensation reaction with DNA polymerase
-each DNA molecule is now genetically identical to the original DNA molecule and contains 1 new strand and 1 original strand

Question 6

What is conservative replication of DNA?

Answer 6

one daughter cell receives the original DNA molecule and the other cell receives a complimentary new copy

Question 7

What is non conservative DNA replication?

Answer 7

original DNA is destroyed completely and two new identical DNA molecules are synthesised

Question 8

What is dispersive DNA replication?

Answer 8

original DNA is dispersed or distributed randomly into each of the daughter molecules