3.8.1

Question 1

What are mutations?

Answer 1

A change to the base sequence of DNA
Caused by errors during DNA replication
Rate of mutation can be increased by mutagenic agents

Question 2

What is a substitution mutation?

Answer 2

One or more bases are swapped for another

Question 3

What is a deletion mutation?

Answer 3

One or more bases are removed

Question 4

What is an addition mutation?

Answer 4

One or more bases are added

Question 5

What is a duplication mutation?

Answer 5

One or more bases are repeated

Question 6

What is an inversion mutation?

Answer 6

A sequence of bases is reversed

Question 7

What is translocation ?

Answer 7

A sequence of bases is moved from one location in the genome to another

Question 8

What is frameshift?

Answer 8

Entire amino acid sequence will be different

Question 9

What are mutagenic agents?

Answer 9

Increase the rate of mutations
UV radiation, ionising radiation, some chemicals, some viruses

Question 10

How do mutagenic agents work?

Answer 10

Act as a base
Alter bases
Change the structure of DNA