Most codons in messenger RNA (from DNA) correspond to the addition of an amino acid to a growing polypeptide chain, which may ultimately become a protein. Stop codons signal the termination of this process by binding release factors, which cause the ribosomal subunits to disassociate, releasing the amino acid chain.
V-chip is a generic term for technology used in television set receivers in Canada, Brazil and the USA, which allows the blocking of programs based on their ratings category. It is intended for use by parents to manage their children's television viewing.
A V block is a device used to hold a round piece of stock secure. Typically used in drilling and machining processes, the V block offers the round piece of wood or steel stock in a cradle-like bed of support. The V block is then able to be placed in a vice or clamp and secured to further steady the work piece.