Download Quiz 1 | BIOL 171 - BIOLOGY I and more Quizzes Biology in PDF only on Docsity!
atom
The atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. TERM 2
proton
DEFINITION 2 The proton is a subatomic particle with an electric charge of +1 elementary charge. TERM 3
neutron
DEFINITION 3 The neutron is a subatomic particle with no net electric charge and a mass slightly larger than that of a proton. TERM 4
electron
DEFINITION 4 The electron is a subatomic particle carrying a negative electric charge. TERM 5
isotope
DEFINITION 5 Isotopes are different types of atoms (nuclides) of the same chemical element, each having a different number of neutrons.
molecule
A molecule is defined as an electrically neutral group of at least two atoms in a definite arrangement held together by very strong (covalent) chemical bonds. TERM 7
compound
DEFINITION 7 A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. TERM 8
pH
DEFINITION 8 In chemistry, pH is a measure of the acidity or basicity of a solution. TERM 9
lipid
DEFINITION 9 Lipids are a broad group of naturally occurring molecules which includes fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others. TERM 10
organic compound
DEFINITION 10 An organic compound is any member of a large class of chemical compounds whose molecules contain carbon.
carbohydrate
A carbohydrate is an organic compound with the empirical formula Cm(H2O)n, that is, consists only of carbon, hydrogen and oxygen, with it in a 1:2:1 atom ratio. TERM 17
amino acid
DEFINITION 17 Amino acids are molecules containing an amine group, a carboxylic acid group and a side chain that varies between different amino acids. TERM 18
covalent bond
DEFINITION 18 A covalent bond is a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms, and other covalent bonds. TERM 19
ionic bond
DEFINITION 19 An ionic bond is a type of chemical bond that involves a metal and a nonmetal ion (or polyatomic ions such as ammonium) through electrostatic attraction. TERM 20
polar molecule
DEFINITION 20 electrons are more towards one end of the molecule
non polar molecule
Electrons are evenly distributed TERM 22
acid
DEFINITION 22 low pH TERM 23
base
DEFINITION 23 High pH
