While DNA, RNA, and starch might seem vastly different at first glance, they share some fundamental commonalities as biomolecules:

* They are all polymers: They are large molecules made up of repeating subunits called monomers.

* They are all organic: They contain carbon as the backbone of their structure.

* They are all essential for life: Each plays a vital role in biological processes.

Here's a breakdown:

DNA (Deoxyribonucleic Acid):

* Monomer: Nucleotides (made of sugar, phosphate, and a nitrogenous base)

* Role: Stores genetic information, blueprint for life.

RNA (Ribonucleic Acid):

* Monomer: Nucleotides (similar to DNA but with a different sugar and base)

* Role: Translates genetic information into proteins, crucial for protein synthesis.

Starch:

* Monomer: Glucose (a simple sugar)

* Role: Serves as a storage form of energy in plants.

In summary, DNA, RNA, and starch are all complex molecules built from smaller subunits, containing carbon, and essential for the functioning of living organisms.