Lecture2 - Body Organization

Lecture2 - Body Organization - Biological Organization...

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Biological Organization Cells => Tissues => Organs => Organ Systems => Organism Modular design but multifunctional components. Main features at each level: Communication Regeneration Repair Energy Requirement Homeostasis: ability of an organism to keep operating parameters within acceptable limits in presence of altered environment – requires a sensory system. We have a narrow range of acceptable temperature, atmospheric pressure, oxgen tension, and acid/base balance Need biological sensors and catalysts to increase reaction rate and specificity. Monomer : small molecule that may become chemically bonded to other monomers to form a polymer. Polymer : substance composed of repeated structural units ( monomers ) joined together by covalent chemical bonds. Classes of Biomolecules 1. Proteins a. Monomers: α-amino acids i. Amino acids : Contain a central carbon atom to which is bonded: 1. Carboxylic Group (acidic: donate protons – extra hydrogens) 2. Amino Group (basic: accept protons) 3. Side Chain
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