DNA may be altered as a result of ________ events that occur normally in cells?

Question

a)depurination

b)deamination

c)depyrimidination

d)all of the above

e)none of the above

Answer 1

sounds like you have a tough professor.

I had a professor like that too, his name was Professor Guimond.

Answer 2

Answer = d)

DNA Damage

1. Endogenous - originates within the cell; also referred to as Spontaneous.

2. Environmental - originates from the environment.

Spontaneous Damage - examples

1. Mismatches that arise during DNA replication

2. Damage resulting from the inherent instability of DNA

 incorporation of uracil

 deamination of bases

 depurination and depyrimidination

3. Oxidative damage

Environmental Damage - examples

1. Ionizing radiation produces base damage and strand breaks

2. UV radiation produces cyclobutane pyrimidine dimers and other photoproducts

3. Alkylating agents alkylate bases

http://info.med.yale.edu/therarad/traini...

Answer 3

d) all of the above