Give 3 examples
2007-12-05 08:18:27 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Biology
High heat, bleach, exposure to pH extremes
2007-12-05 08:25:42 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Spontaneous chemical changes of the bases
Radiation
Chemicals that react with the bases
Random errors during DNA synthesis
2007-12-05 16:30:14 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋
UV light
http://theoncologist.alphamedpress.org/cgi/content/full/6/3/298
Radiation:
http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed&uid=10203748&cmd=showdetailview&indexed=google
(It comes from stars and naturally occuring minerals.)
Plant Toxins, Like Ricin
http://www.fasebj.org/cgi/content/abstract/16/3/365
and that's not counting naturally occuring DNA errors.
2007-12-05 16:24:49 · answer #3 · answered by LabGrrl 7 · 0⤊ 0⤋
- mutagenic chemicals, such as ethidium bromide (EtBr)
- ionising radiation, such as UV-light or gamma rays (as above)
These factors generally affect the enzymes performing DNA replication causing more mistakes than usual to occur.
Mistakes in replication also occur naturally without any help from outside, so I suppose that could be a cause as well!
2007-12-05 16:33:07 · answer #4 · answered by mountainpenguin 4 · 0⤊ 0⤋