Answer:
Your question is a bit vague, but let me try to help you out.
The instructions that build an organism is called DNA or Deoxyribonucleic Acid. These are lines of chemical bases that code for the different functions that enable living organisms to develop (grow), reproduce and live.
DNA is found in the nucleus of cells of eukaryotes and mitochondria, but for prokaryotes they are found in the cytoplasm (because they have no true nucleus)
