Can somone pleaseee answer this

Condensation reaction

Explanation:

Because in a condensation reaction two or more molecules combine to form a larger molecule, with the simultaneous loss of a small molecule such as water or methanol,in dehydration reaction

For example:

A simple example is the condensation of two amino acids to form a peptide. This reaction example is the reverse of hydrolysis, which splits a chemical entity into two parts through action from the polar water molecule, which itself splits into hydroxide and hydrogen ions.

i believe it would be the lungs.

the backbone of the dna and rna compound is sugar phosphate.