"to which nucleotide base are methyl groups added during the process of dna methylation? "

Methylation occurs on cytosine and adenine nucleotide bases.  Methylation of Cytosine occurs with a high affinity, especially in the CpG islands. Methylation happens at the 5’ carbon in the pyrimidine ring to form methyl-cytosine through the addition of a methyl group.

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.

The salt in the sea water dehydrated the sailor because her body could not take in the amount to salt in the sea water