Mutations And Mutagens Flashcards
1
Q
Mutation
A
Permanent change in the base sequence of dna
2
Q
Spontaneous mutations
A
Arise naturally mainly from errors in dna replication
3
Q
Induced mutations
A
Caused by mutagens
4
Q
Mutagens
A
Environment factors that, when exposed to cells, can alter the genetic material of an organism.
5
Q
Three categories of mutagens:
A
Radiation, chemical compounds, and viruses
6
Q
Radiation mutagens…
A
Cause two dna strands to break which results in loss of nitrogenous bases,
7
Q
Cross linking
A
Strong bonds form between nitrogenous bases on opposite DNA strands or adjacent to each other. Dna will be unable to unwind. Cell will eventually die (no photosynthesis)
8
Q
How do viruses invade healthy cells?
A
They integrate their genome with the dna of the host cell so it is passed to new cells.
