Report Abuse. Its gotta be A because ADH helps the kidney conserve the water but not salt. It is secreted by the posterior pituitary, not the kidney. ADH conserves body water by decreasing urine production. ADH causes the kidneys to return more water to the blood and this has the effect of decreasing urine volume.ts gotta be A because ADH helps the kidney conserve the water but not salt. It is secreted by the posterior pituitary, not the kidney. ADH conserves body water by decreasing urine production.
Nucleic acids are polymers of individual nucleotide monomers. Each nucleotide is composed of three parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base. Only two 5-carbon sugars are found in nature: ribose and deoxyribose.
The DNA molecule is technically classified as a bipolymer, which means that it contains two polymer chains that link up to form the larger molecule. Each of these polymer chains is composed of a DNA monomer, or nucleotide, whose structure is formed from a phosphate group, a deoxyribose sugar and a nitrogen-containing base. The deoxyribose sugar forms part of the backbone of each DNA strand, which line up along the outside of the whole DNA molecule.