Acer executives promote the company's new BYOC strategy. Acer CEO Jason Chen is on far left. Acer Chairman Stan Shih is second to the left. Although the new cloud apps are free, the company wants to include extra features users can choose to pay for.
All proteins are made up of combinations of 20 different amino acids. The RNA code (like DNA) is written in just four different chemical 'letters' - bases. How can a code with four letters identify 20 different amino acids? By reading it three letters at a time - CAU, CAG, GGA, etc.
How are proteins made? To make a protein, a cell must put a chain of amino acids together in the right order. RNA is similar to DNA: it consists of strands of four different chemical building blocks, or bases, attached to a chemical backbone. All proteins are made up of combinations of 20 different amino acids.