Patent protection for design patents only lasts for 14 years after the patent is granted, so they offer six years less protection than other patent types. Unlike plant and utility patents, however, no maintenance fee is required to keep a design patent active.
A virus is a small, infectious agent that is made up of a core of genetic material surrounded by a shell of protein. The genetic material (which is responsible for carrying forward hereditary traits from parent cells to offspring) may be either deoxyribonucleic acid (DNA) or ribonucleic acid (RNA).
DNA and RNA molecules are polymers (like polysaccharides and proteins). The building blocks (monomers) of nucleic acids are nucleotides. Each nucleotide is made up of a five-câ¦arbon sugar, a phosphate group, and a nitrogenous base. In terms of elements, they are made up of P, O, N, C, and H. In a recent find, though, a bacterial strain was using As instead of P.