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Cell Theory • The cell is the basic unit of life. • All living things are composed of cells. Unicellular & multicellular. • All cells come from pre-existing cells. Important organelles in a Cell Nucleus: contains the cell’s DNA. ‘Brain’ of the cell. Mitochondnon: Site of respiration. Provides the energy for the cell to function. Ribosomes: Site where proteins are made (including enzymes). Vacuole: Storage Cytoplasm: Watery fluid that all the cell organelles float in. _____________________________________________ Unicellular organisms: Made of only one cell. Multicellular: Made up of more than one cell eg Humans. Research Microorganisms are small, unicellular organisms that can be both beneficial & dangerous. Find out about 1. ONE beneficial microorganism used in the food industry - what is its scientific name? - what does it do for our food that is helpful? One microorganism is yeast. It’s scientific name is Saccharomyces Cerevisiae.