A stainless steel countertop. A countertop (also counter top, counter, benchtop, (British English) worktop, or (Australian English) kitchen bench) is a horizontal work surface in kitchens or other food preparation areas, bathrooms or lavatories, and workrooms in general. It is frequently installed upon and supported by cabinets.
Proteins, polysaccharides and nucleic acids are polymeric organic molecules built out of a very large number of repeating sub-units. The nucleic acids, double-helical DNA and single-stranded RNA are built
Protein Structure and Function. A protein is a functional biological molecule that is made up of one or more polypeptides that are folded/coiled into a specific structure . Proteins are important macromolecules that serve as structural elements, transportation channels, signal receptors and transmitters, and enzymes.