gamma ray. A stream of electromagnetic radiation having wavelengths shorter than those of x-rays and therefore greater energy and penetrating power.. A photon of electromagnetic radiation of very short wavelength, less than about 0.01 nanometer, and very high energy, greater than about 100,000 electron volts. Gamma rays are emitted in the decay of certain radioactive nuclei and in electron-positron annihilation. 2. A narrow beam of such photons.
The ribosomes makes proteins using coded instructions that come from the nucleus
1 The instructions for protein synthesis-the code for the correct order and number of amino acids for each protein-is contained in the. ( 2 in the genes, on the. ). 3  In fact, this is a main function of the genetic material-to store the instructions that allow the cell to make proteins. Amino acids are the subunit that are extended in a long chain to become proteins. 2  There are 20 different amino acids. 3  All cells in all organisms (bacteria, protozoa, fungi, plants, and animals) use these 20 amino acids to make proteins.