BIOL 202 Study Guide - Quiz Guide: Deoxyribose, Carboxylic Acid, Nucleobase
1 Feb 2017
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Chapter 2 the chemical building blocks of life. Biosphere: part of the earth where life occurs. Cellular chemistry: chemical reactions between atoms and molecules that provide for the metabolism found in microbial cells. Matter: anything that occupies space and has mass. Chemical elements: most basic forms of matter that cannot be broken down into simpler substances. Chnops: carbon, hydrogen, nitrogen, oxygen, phosphorous, sulfur: chnops make up 98% of humans and bacteria. trace elements: Valence electrons: the outermost electrons; the electrons occupying the outermost energy level. Anion: a negatively charged ion; gained an electron. Cation: a positively charged ion; lost an electron. Chemical bond: the result of unstable atoms reacting together and filling each tracers: radioactive substances/isotopes that are used to follow substances. Isotopes: an atom of an element that has a different number of neutrons. others outermost shells. ionic bond: type of bond in which atom gives its valence electrons to another: forms salts, relatively weak.
