MCAT EXAM REVIEW 2 QUESTIONS
AND ANSWERS (GRADED A)
what will increase electric field strength - ANSWER - formula= E=mg/q
therefore,
increasing the density of the oil and decreasing the charge magnitude of the drop
will increase the E
what will decrease electric field strength - ANSWER - formula= E=mg/q
decreasing the mass of the oil drop would decrease the E
voltage formula - ANSWER - V=I*R (voltage = current*resistance)
in an oil drop experience what explains the variation in the values of the floating
voltage for the different droplets - ANSWER - the charge of the droplets differ
because the amount of ionization due to the x-rays is random
there is no way to control the exact number of excess electrons in the ionized air
that will cling to a falling oil droplet, but the net charge must be a whole number
multiple of the elementary charge
there is no drag from something that isnt - ANSWER - moving
like a droplet in static equilibrium
N vs S vs W blots - ANSWER - N=RNA
S=DNA
W= protein
,leptin - ANSWER - A hormone produced by adipose (fat) cells that acts as a satiety
factor in regulating appetite.
ghrelin - ANSWER - A hunger-arousing hormone secreted by an empty stomach
what will cause oxidative phosphorylation to not proceed - ANSWER - in the absence
of the proton gradient across the inner mitochondria membrane no electrochemical
gradient has been built= not ox phos
if the proton gradient stops functioning, what will happen to the ETC - ANSWER -
ETC will continue to pass electrons along the transport chain, but the piped protons
will return to the matrix of the mito when protons gradient restored
ATP is a particularly good energy carrier because it has - ANSWER - an intermediate
transfer potential
this allows higher energy phosphate carrier to drive the synthesis of ATP by
transferring their phosphate groups to ADP
how to determine polarity - ANSWER - the polarity of a bond depend on the
difference in EN between the two bonding atoms
the larger the difference, the more unequal the sharing of electrons, and the more
polar the bond
positive charged amino acids - ANSWER - lysine, arginine, histidine
negatively charged amino acids - ANSWER - aspartic acid, glutamic acid
hydrophobic amino acids - ANSWER - Alanine, Valine, Isoleucine, Leucine,
Methionine, Phenylalanine, Tyrosine, Tryptophan
hydrophilic amino acids - ANSWER - lysine, arginine, histidine, glutamate, aspartate,
asparagine, glutamine
, intensity of sound - ANSWER - for each increase by 10 in the decibel level, the
intensity of the sound increases by a factor of 10.
55-35= 20 (so 10+10)
so 10^2=100
how doe you change a reactions equilibrium constant - ANSWER - change in
temperature
volume flow rate - ANSWER - f=Av
A= cross-sectional area of the cylinder
v= average speed of the flow
cross-sectional area of a cylinder units= m^3/s
lewis acid - ANSWER - acts as an electron acceptor
lewis base - ANSWER - functions as an electron donor
Bronsted acid - ANSWER - proton donor
bronsted base - ANSWER - proton acceptor
a low Kd means - ANSWER - high binding affinity
question 24 - ANSWER -
glutamate - ANSWER - acidic amino acid
AND ANSWERS (GRADED A)
what will increase electric field strength - ANSWER - formula= E=mg/q
therefore,
increasing the density of the oil and decreasing the charge magnitude of the drop
will increase the E
what will decrease electric field strength - ANSWER - formula= E=mg/q
decreasing the mass of the oil drop would decrease the E
voltage formula - ANSWER - V=I*R (voltage = current*resistance)
in an oil drop experience what explains the variation in the values of the floating
voltage for the different droplets - ANSWER - the charge of the droplets differ
because the amount of ionization due to the x-rays is random
there is no way to control the exact number of excess electrons in the ionized air
that will cling to a falling oil droplet, but the net charge must be a whole number
multiple of the elementary charge
there is no drag from something that isnt - ANSWER - moving
like a droplet in static equilibrium
N vs S vs W blots - ANSWER - N=RNA
S=DNA
W= protein
,leptin - ANSWER - A hormone produced by adipose (fat) cells that acts as a satiety
factor in regulating appetite.
ghrelin - ANSWER - A hunger-arousing hormone secreted by an empty stomach
what will cause oxidative phosphorylation to not proceed - ANSWER - in the absence
of the proton gradient across the inner mitochondria membrane no electrochemical
gradient has been built= not ox phos
if the proton gradient stops functioning, what will happen to the ETC - ANSWER -
ETC will continue to pass electrons along the transport chain, but the piped protons
will return to the matrix of the mito when protons gradient restored
ATP is a particularly good energy carrier because it has - ANSWER - an intermediate
transfer potential
this allows higher energy phosphate carrier to drive the synthesis of ATP by
transferring their phosphate groups to ADP
how to determine polarity - ANSWER - the polarity of a bond depend on the
difference in EN between the two bonding atoms
the larger the difference, the more unequal the sharing of electrons, and the more
polar the bond
positive charged amino acids - ANSWER - lysine, arginine, histidine
negatively charged amino acids - ANSWER - aspartic acid, glutamic acid
hydrophobic amino acids - ANSWER - Alanine, Valine, Isoleucine, Leucine,
Methionine, Phenylalanine, Tyrosine, Tryptophan
hydrophilic amino acids - ANSWER - lysine, arginine, histidine, glutamate, aspartate,
asparagine, glutamine
, intensity of sound - ANSWER - for each increase by 10 in the decibel level, the
intensity of the sound increases by a factor of 10.
55-35= 20 (so 10+10)
so 10^2=100
how doe you change a reactions equilibrium constant - ANSWER - change in
temperature
volume flow rate - ANSWER - f=Av
A= cross-sectional area of the cylinder
v= average speed of the flow
cross-sectional area of a cylinder units= m^3/s
lewis acid - ANSWER - acts as an electron acceptor
lewis base - ANSWER - functions as an electron donor
Bronsted acid - ANSWER - proton donor
bronsted base - ANSWER - proton acceptor
a low Kd means - ANSWER - high binding affinity
question 24 - ANSWER -
glutamate - ANSWER - acidic amino acid
