AP BIOLOGY: UNIT 1 BIOCHEMISTRY
EXAM WITH COMPLETE ANSWERS{
LATEST UPGRADE}
CHONPS -✔✔ carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur
ionic bond -✔✔ transfer of electrons from one atom to another
covalent bond -✔✔ a bond formed when atoms share one or more pairs of
electrons
(polar bond = unequal sharing, non-polar bond = equal sharing)
hydrogen bonds -✔✔ weak bonds between hydrogen and negatively
charged items
hydrophobic interactions -✔✔ how non-polar compounds congregate
together (lipids)
pH scale -✔✔ # of H ions determines scale
logarithmic: pH =10^-3 = 1/1000
acid-base -✔✔ 0-14
, 0-6= acidic
7= neutral
8-14= basic
pH of enzymes -✔✔ blood: 7.4
stomach: 2
small intestine: 8
cohesion -✔✔ attraction to other water molecules
adhesion -✔✔ attraction to other charged compounds, low density when
frozen
versatile solvent -✔✔ water easily dissolves ions and other polar
molecules
high heat of vaporization -✔✔ amount of heat necessary to cause a phase
transition between a liquid and a gas; a lot of heat is needed to turn water
into gas
high heat of fusion -✔✔ amount of heat energy that must be removed from
a substance to cause it to change from a liquid to a solid
surface tension -✔✔ measure of how difficult it is to stretch or break the
surface of a liquid
polarity -✔✔ the property of having poles or being polar.
EXAM WITH COMPLETE ANSWERS{
LATEST UPGRADE}
CHONPS -✔✔ carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur
ionic bond -✔✔ transfer of electrons from one atom to another
covalent bond -✔✔ a bond formed when atoms share one or more pairs of
electrons
(polar bond = unequal sharing, non-polar bond = equal sharing)
hydrogen bonds -✔✔ weak bonds between hydrogen and negatively
charged items
hydrophobic interactions -✔✔ how non-polar compounds congregate
together (lipids)
pH scale -✔✔ # of H ions determines scale
logarithmic: pH =10^-3 = 1/1000
acid-base -✔✔ 0-14
, 0-6= acidic
7= neutral
8-14= basic
pH of enzymes -✔✔ blood: 7.4
stomach: 2
small intestine: 8
cohesion -✔✔ attraction to other water molecules
adhesion -✔✔ attraction to other charged compounds, low density when
frozen
versatile solvent -✔✔ water easily dissolves ions and other polar
molecules
high heat of vaporization -✔✔ amount of heat necessary to cause a phase
transition between a liquid and a gas; a lot of heat is needed to turn water
into gas
high heat of fusion -✔✔ amount of heat energy that must be removed from
a substance to cause it to change from a liquid to a solid
surface tension -✔✔ measure of how difficult it is to stretch or break the
surface of a liquid
polarity -✔✔ the property of having poles or being polar.
