4 classes of macromolecules Correct Answers carbohydrates,
lipids, proteins, nucleic acids
a neutral atom has... Correct Answers same number of protons
and electrons
a pH of 7 is Correct Answers neutral
Acids increase... Correct Answers H+ concentration
anion Correct Answers A negatively charged ion
atom Correct Answers Basic unit of matter
atomic mass Correct Answers
atomic number is determined by... Correct Answers the number
of protons in an atom
buffer Correct Answers compound that prevents sharp, sudden
changes in pH
building block of carbohydrates Correct Answers
monosaccharides (simple sugars)
building block of lipids Correct Answers fatty acids and
glycerol
building block of nucleic acids Correct Answers nucleotides
, building block of proteins Correct Answers amino acids
Carbohydrate examples Correct Answers monosaccharides,
disaccharides, polysaccharides
cation Correct Answers A positively charged ion
chemical bonds Correct Answers form when atoms interact and
complete their valence shells
cis-trans isomers Correct Answers have the same covalent
bonds but differ in spatial arrangements
common themes of life Correct Answers organization,
information, energy and matter, interactions, evolution
Components of an atom Correct Answers nucleus, protons,
neutrons, electrons
compund Correct Answers a substance that is composed of two
or more elements in a fixed ratio
condensation reaction Correct Answers a chemical reaction in
which two or more molecules combine to produce water
covalent bonds Correct Answers created by sharing of electrons
electron shell Correct Answers an electron's state of potential
energy