MT: Chemical Reactions and Cell Processes Bullet 1: Terms MT: Chemical Reactions and Cell Processes

Levels of Organization of Life Atoms Molecules Organelles We are now focusing on a microscopic level Cells Tissue Organ Organ system Organism

Prokaryote A unicellular organism without a nucleus or organelles Ex: bacteria

Eukaryote Organism that has a nucleus and organelles Ex: plants, animals, fungi, protista

Cytoplasm Jelly-like fluid that cell contents float in In eukaryotes and prokaryotes

Semi-permeable Cell Membrane A phospholipid (fat) bilayer that surrounds cells and regulates what goes in and out of the cell In prokaryotes and eukaryotes

Adenosine Triphosphate (ATP) A chemical that creates energy when one of its three phosphates is removed Constantly recycled ADP + P = ATP

Photosynthesis CO2 + H2O + sunlight = C6H12O6 + O2 A chemical reaction in which CO2, H2O, and sunlight produce O2 and C6H12O6 (glucose) Producers and some bacteria do this

Cellular Respiration C6H12O6 + O2 = CO2 + H2O + ATP (energy) A chemical reaction in which O2 and C6H12O6 (glucose) produce CO2, H2O, and ATP (energy) Plants and animals do this