A displacement reaction (sometimes called a replacement reaction) takes place when .

Explanation:

The type of reaction in which part of one reactant is displaced by another reactant is called displacement reaction. It is also called a replacement reaction. As replacement of one ion of reactant takes place by another ion of reactant.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides