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ionic bond
attraction bt oppositely charged ions
covalent bond
sharing of electrons
hydrogen bond
weak attraction bt hydrogen atom & electronegative atom
molecular weight
sum of atomic masses of all atoms in mol
exchange reaction
molecules swap parts to form new compounds
water is important to living systems because
temp buffer, solvent, common reactant, forms H-bond
acid
donated one or more H+
base
donated one or more OH-
salt
contains neither H+ nor OH-
____ are simple lipids, ____ are complex lipids, and ____ are ring-structured lipids
glyceral and fatty acids, phosphate, steroids
lipids are bonded by ____, head is ____ and tail is ____
esther linkage, polar, nonpolar
____ are building blocks of carbohydrates
monosaccharides by glycocidic bond
____ are building blocks of proteins
amino acids linked by peptide bones
primary, secondary, tertiary, quaternary
the sequence of aa, foldings into sheets, 3d structure, multiple polypeptide chains
nucleic acid are bonded by ____
phosphodiester
____ are building blocks of nucleic acids
pentose, phosphate, nitrogenous base