(Unit 2 Test Review Answer Key review)
Terms in this set (36)
What four elements make up 96% of living matter
carbon hydrogen oxygen and nitrogen
what is the appropriate atomic mass of an atom with 16 neutrons, 15 protons and 15 electrons
How do isotopes of the same element differ from one another
the number of neutrons
outer-shell electrons of two atoms are shared to fill the velence shells of both atoms
forward and reverse reactions continue with no effect on the concentration of reactants and products
the existence of unpaired electrons in the valence shell
reactivity of an atom
a single molecule of water is bonded to a single oxygen atom by
polar covalent bonds
at what temperature is water its densest?
polar or change molecule that dissolves in water, examples are salt and sugar
non-polar molecule, repels water... example is oil and fat
What are four properties of water that make life possible on earth?
polarity, cohesion + adhesion, moderation of temperature, insulation of ice, solvent for life
how many molecules of glycerol would be present in 1 L of a M of a glycerol solution?
6.02 X 10^23
if the PH of a solution is decreased from 9 to 8, it means the...
concentration of H+ has increased and the concentration of OH- has decreased 10 times
if the PH of the blood increases...
there is a decrease in the concentration of H2CO3 and an increase in the concentration of H2O
Acid rain loweered the PH of the lake to 4.0. What is the hydrogen ion concentration of the lake?
Organic chemistry is the study of
compounds containing carbon
A compound contains hydroxyl groups as its predominate functional group which means it...
should dissolve in water
breaks down polymers into monomrs, requires addition of H2O example digestion of starch
bonding of monomers to form polymers, water leaves the molecule example formation of glycogen in liver
most possible hydrogens, no double bonds, solid at room temperature example is lard, butter
double bond, kink in tail liquid at room temperature example is oil
humans have enzymes that can hydrolyze the alpha (a) glycosidic linkages of starch but not beta (b) glycosidic linkages of cellulose
humans can digest starch but not cellulose
one end has a free carboxyl group one end has a free amino group
difference between polypeptide ends
at which level of the protein structure are the a-helix and b-pleated sheets found
held together by interactions between r ground side chains
at which levels of organization could change the function of a protien
all of them
structure of a nucleotide
phosphate group, pentose, nitrogenous base
glycerol and three fatty acids
DNA or RNA
Sugar, stores genetic info, A-T, double strands and stays in the nucleus
sugar, transmits genetic info, A-U, single stranded, in or out of the nucleus
the sharing of a pair of valence electrons by two atoms
the transfer of valence electrons resulting in negative and positive ions attracted to each other by opposite charges