Bio 1320 Banta TxState Final

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What are the particles that make up an atom and where is each located?protons-center of atom neutrons-nucleus electrons-orbit the centerHydrogen bondwhen a slightly + side of a polar molecule is attracted to a slightly - side of another polar molecule -very weak -ex waterCovalent bondsharing electrons -strong, hard to break -if E shared evenly = (non-polar) neutral all over -if E is shared unevenly= (polar) (has +/- areas)Ionic bondmade by anion and cation forming bonds -weak, easy to break ex waterWhat happens when you vary the number of neutrons in an atom?Some isotopes become stable, some become unstable (radio active)Make sure you understand the basic concepts of what makes something radioactive and what happens during radioactive decay. What is released?1. Energy 2. a particle (alpha, beta, gamma)Ionis an atom or molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.cationlosing electrons (atoms have a + charge)aniongaining electrons (atoms have - charge)How are free radicals formed?a molecule that has been stripped from electrons that it should have, usually oxygen. Produced during normal chemical reactions.How do you antioxidants help get rid of free radicals?They help stabilize free radicals by breaking down chain reactionsWhat is the difference between organic and inorganic molecules?Organic must have carbon AND hydrogen. Inorganic only have one or the otherKnow the 4 families of organic molecules1.Carbohydrates 2. Lipids 3.Protiens 4. Nucleic acids Carl Likes Pu$$y *****What makes a carbohydrate a carbohydrate?Used primarily as an energy source. Structural support tooWhat are monosaccharides?Single sugar molecule... rings -fructose, ribose, deoxyribose, glucose (MOST COMMON)What are disaccharides?2 monosaccharides bonded together maltose, lactose, sucrose (table sugar)What are polysaccharides?3 or more monosaccharides Used for structure (cellulose-plants, chitin-animals) and energy storage (starch)What are lipids?Fats, oils, waxes, steroids