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DNA Repair Defining
The process of DNA repair is used to identifies and correct damage to the DNA molecule that encodes its genome.
The metabolic activities and environmental factors affect on the DNA like radiation can cause DNA damage.
Most probability the DNA damage affects the primary structure of double helix.
The rate of DNA repair based on various factor. Such as cell type,the age of the cell,and the extracellular environment.
SOURCES
DNA damage is classified into two main type:-
1.Endogenous damage: when the normal metabolic By-product is formed reactive oxygen species which attack on the DNA cause spontaneous mutation.
>cause replication error.
2. Exogenous damage: when external agent affect on DNA like:
>ultraviolet(UV 200-400nm) radiation from sun.
>few plants toxins.
>mutagenic chemicals made by humans.