Dna Replication

Question 1

Main ezymes involved in dna replication

Answer 1

Helicase
Single strand binding proteins
Primase
Dna polymerase
Exonuclease
Dna ligase

Question 2

Helicase

Answer 2

Unwinds dna helix

Question 3

Single strand binding proteins

Answer 3

Stabilise seperate strands

Question 4

Primase

Answer 4

Adds a short Rna primer to Dna strand

Question 5

Dna polymerase

Answer 5

Binds nucleotides to form new strands

Question 6

Exonuclease

Answer 6

Removes Rna primer and inserts correct base

Question 7

Dna ligase

Answer 7

Joins okazaki fragments and seals other nicks in sugar-phosphate backbone

Question 8

Types of mutations

Answer 8

Point mutation
Deletion mutation
Insertion mutation
Frameshift mutation
Inversion mutation

Question 9

Point mutation

Answer 9

Change of base pair

Question 10

Deletion mutation

Answer 10

Removal of one or more bases

Question 11

Insertion mutation

Answer 11

Insertion of one or more bases (portion of dna sequence reversed)

Question 12

Frameshift mutation

Answer 12

Deletion or insertion of a number of bases that cannot be dovided by 3

Question 13

Inversion mutation

Answer 13

Inversion of a sequence of bases (may cause frameshift)

Question 14

Point mutation, silent mutation

Answer 14

Codes for the same animo acid

Question 15

Point mutation, missence mutation

Answer 15

Codes for a different amino acid

Question 16

Point mutation, nonsense mutation

Answer 16

Codes for a stop, which can trunate the protein

Question 17

Translocation

Answer 17

A piece of chromosome attaches to another chromosome

Question 18

Point mutation, transition

Answer 18

Exchanges a purine for a purine

Question 19

Point mutation, transversion

Answer 19

Exchanges a purine for a pyrimidine or pyrimidine for a purine