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28 Cards in this Set

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Atom
Smallest Unit of an element. Positively Charged Nucleus, Negatively Charged Cloud
Molecule
Smallest particle of a substance, composed of 2 or more atoms.
Chemical Bond
Any of several forces or mechanisms; Ionic, Covalent, and metallic bond. Atoms or ions are bound in a molecule.
Neutron
Elec Neutral subatomic prat...stable in a nucleus
Proton
Stable Positive subatomic part...
Electron
Stable subatomic partical mass 9,1066e-28 grams 1.6e-19 coulombs charge
Atomic Number
Number of protons in an atomic nucleus
Isotope
mic number but different atomic mass
Radioactivity
Spontaneous emission of radiation, either by directly from unstable nuclei or by nuclear reaction.
Covalent bond
chemical bond formed by sharing of one or more elections, usually pairs, between atoms
Ionic bond
Chemical bond between two ions with opposite charges
Hydrogen bond
Chemical bond where hydrogen atom of one molecule is attracted to an electronegative atom, O,N,F of another molecule
pH
Used to measure acidity of a solution (0-14) 7 neutral.
Amino Acids
Organic compound amino group and carboxylic acid group, mainly the 20 in DNA
Proteins
Complex organic macromolecules that contain C, H, O, N and S and are of one or more chains of Amino Acids, are neces for proper organ function
Nucleotides
Various compounds consisting of a nucleoside combined with a phosphate group forming constituents of DNA and RNA
Nucleic acids
Grp of complex compounds found in all living cells and in DNA and RNA control cellular function and heredity
Thermodynamics
deals with the relationships and conversions between heat and other forms of energy
Anabolic
phase of metabolism in which simple substances are synthesized into the complex materials of living tissues
Catabolic
metabolic breakdown of complex molecules into simpler ones often results in release of energy
Endergonic (Endergomic)
Requiring energy
Exergonic
Releasing energy
Enzymes
proteins or conjugated proteins produced by organisms and functioning as biochem catalysts
Coenzymes
nonproteinaceous organic substance contains vitamin or mineral and combines with a protein to form active enzyme system (Coenzyme-A)
Photosynthesis
carbohydrates are synthesized from carbon dioxide and water using light as energy, most release O2 as byproduct
Cellular Respiration
series of metabolic processes by which living cells produce energy through the oxidation of organic substances
Aerobic
Living or occurring only in the presence of oxygen
Anaerobic
can live in the absence of atmospheric oxygen (organism usually bacteria)