Biology Biochemistry with correct answers

Biology Biochemistry element - correct answer a pure substance that cannot be broken down into other substances by physical or chemical means hormone - correct answer a naturally occurring substance secreted by specialized cells that affects the metabolism or behavior of other cells monosaccharide - correct answer the most simplistic form of carbs...one sugar C6 H12 O6 galactose fructose glucose disaccharide - correct answer two monosaccharides bonded together...two sugars C12 H22 O11 lose one water molecule lactose sucrose maltose polysaccharide - correct answer large complex chains of monosaccharides starch-plants cellulose-plant cell wall glycogen-animals isotope - correct answer atoms of the same element that have the same number of protons and electrons but have a different number of neutrons covalent bond - correct answer chemical bonds formed when electrons are shared ionic bond - correct answer A bond between a metal and a non-metal ex) salt valence shell - correct answer The outermost shell contains the electrons that are involved in bond formation, for they are the least tightly bound to the nucleus and thus can be removed most readily. 1st shell-2 2nd shell-8 3rd shell-8 4th shell-18 isomer - correct answer A molecule with the same empirical formula, but a different arrangement/shape of the atoms