Biology 1001A Midterm: 2011.10.29 - Bio 1001 Midterm Definitions.docx
Document Summary
Electronegativity: the measure of an atom"s attraction for the electron it shares in a chemical bond with another atom. Polarity: separation of electric charge leading to a molecule or its chemical groups having an electrical dipole or multipole moment. Fatty acid: one of two compounds of a neutral lipid, containing a single hydrocarbon chain with a carboxyl group linked at one end. Triglyceride: a non polar compound produced when a fatty acid binds by a dehydration synthesis reaction at each of glycerol"s three - oh-bearing sites. Amphipathic: contains a region that is hydrophobic and a region that is hydrophobic. Desaturases: a group of enzymes that synthesis unsaturated fatty acids. Archaea: single-celled microorganisms; have no cell nucleus or any other membrane-bound organelles within other cells. Eukarya: an organism whose cells contain complex structures enclosed within its membrane. Transmission electron microscope: operates on the same basic principles as the light microscope but uses electrons instead of light.