Nucleotides are the basic unit of which macromolecules?

Nucleic acid

Explanation:

Nucleotides are the basic unit of Nucleic acid

A nucleotide consists of three groups –  

a)5-carbon sugar (ribose or deoxyribose)

b)a nitrogen-rich base   - There are four nitrogen rich base namely cytosine (C), guanine (G), adenine (A), thymine (T)

c)and a phosphate group

The nucleotides are the repeating units of a nucleic acid and  therefore a nucleic acid can be considered as polymer while a nucleotide becomes its monomer unit.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation: