Alkyltransferases belong to the group of such proteins which are involved in repairing the DNA by reversing the damage. They are present in the prokaryotic as well as eukaryotic cells. These proteins tend to remove the alkyl groups like methyl, ethyl etc. from the bases, guanine and thymine. The alkyltransferases which are present in E. coli have an ability to remove methyl group from the phosphate groups present in the backbone of the DNA.
The alkyl group which is removed from the base is transferred to the cysteine residue. In this way, both the bases present in the DNA get restored. These enzymes are known as suicide enzymes as they are used up during the process.
How is an F′ factor different from an F factor?
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
In fruit flies, curved wings are recessive to straight wings,
What is an advantage and a disadvantage of this repair system?
Explain the type of speciation (allopatric, parapatric, or sympatric
The raw material for evolution is random mutation. Discuss whether or
With regard to the timing of conjugation, explain why the recipient
A woman who is heterozygous, Bb, has brown eyes;
A recessive allele in mice results in an unusally long neck.
Why is an antibody used in this experiment? From