Types of DNA damage

Question 1

what are common types of errors?

Answer 1

spontaneous mutations called depurination and deamination

Question 2

what is depurination?

Answer 2

loss of A or G

Question 3

what is Deamination?

Answer 3

Change of C to U

Question 4

What are induced types of DNA damage?

Answer 4

Radiation and chemicals

Question 5

what does radiation do?

Answer 5

produces thymine dimers, sunlight can cause this

Question 6

what do chemical errors do?

Answer 6

intercalate (insert) into DNA strands

Question 7

how many proteins are devoted to DNA repair?

Answer 7

50

Question 8

what are the basic steps for repair?

Answer 8

1. endonuclease excises damaged DNA
2. DNA polymerase fills in the gap
3. Nick sealed by DNA ligase