FL 5 AAMC MCAT
1. What is the chemical structure of a component found in four of the
five cofactors used by Na+-NQR?: says it is composed of flavin structure is
a nucleotide base structure B could be structure C also could be structure D is
an amino acid down between B and C
to help, look at the captioned note on the table. it says Fl represents flavin which is
the redox active center in four of the five cofactors of Na+-NQR
C has an uniquinone AND HERE IS IS MENTIONED THAT UNIQUINONE IS IS A
SUBSTATE
2. What is the ratio of cation to enzyme in the spectroelectrochemical
experiments described in the passage?: cation : enzyme
passage says Na+NQR was diluted to a final concentration of 0.75 mM in
0.150 molar of the cation ions cation .15 M:
3. The reaction between NADH and ubiquinone is exergonic, but the
reaction, when catalyzed by Na+-NQR, does not generate much heat in vivo.
What factor accounts for this difference?: Conservation of energy, it is not
created nor destroyed but merely changes forms
A. Is not possible, Even if it was heat generation would be larger for a catalyzed
rection.
C. is impossible, reactants have to be close together to react
The movement of a charged particle against its concentration gradient is
energetically costly.
4. Two open flasks I and II contain different volumes of the same liquid.
Suppose that the pressure is measured at a point 10 cm below the surface
of the liquid in each container. How will the pressures compare?:
pressure=pgh g=10
p= density (same liquid so same density) h=
10 cm
both have same height so pressure will be the same-- if heights were different
pressure would be different
5. Question
Which of the following substances is polar?: If there is a net dipole it is polar
6. Question
If all else is held constant, which of the following changes would NOT
double the volume of a gas?: pv=nrt
7. What is the number of neutrons in the nucleus of the atom used to
produce laser radiations?: 86Kr+ laser
, FL 5 AAMC MCAT
86= mass
Kr has proton number as 36
86-36=50
the cation or anion charge with any element is indicative of the charge aka
electron count
8. What is the molecular formula of the heterocyclic aromatic compound
pyrrole?: passage says its a tetra pyrrole so there are 4 carbons
9. The radiation of wavelength 605 nm CANNOT be used to produce the
fluorescence radiations depicted in Figure 3 because:: Maybe if you read the
passage for once in your life and not get confident then maybe you wouldn't have
to take the exam for a third time
Not D because look at the passage
not C because of E=hc/lambda (high wavelength low energy)
10. Approximately how many moles of Kr+ are contained in the laser tube
at 0°C and 1 atm?: Have to recognize STP conditions of 0 C and 1 atm (22.4 L)
Volume in PV=nrt is in L
1cm^3=1mL
11. The CD spectroscopy signal that was used to generate the data in
Figure 1 arises from the chirality of the:: look for what is chiral B is not
C is not
D- most beta carbons are not chiral
12. Samples from various time points of the proteolysis of TPMTwt were
subjected to SDS-PAGE under reducing conditions. Which figure best depicts
the expected appearance of the gel?: - For proteolysis, the protein is expected to
be broken up over time
- Small fragments will travel faster in the SDS-PAGE
A and B show that they are building up or oligermizing
13. If the combined mass of the TPMT substrate and cofactor was
determined before the enzymatically catalyzed reaction and then
compared to the combined mass of the product and the cofactor after
the reaction, the net change in molecular weight will be:: Passage says
that TPMT is an enzyme
(methyltransferase) can also think about the
conservation of mass balance equation on
products and reactants
, FL 5 AAMC MCAT
14. The structure of Compound 2 is shown.
Compound 2
What structural feature(s) is(are) most important to the functioning of this
compound as described in the passage?: - Compound 2 helped extract the
receptor
- Receptor is MPR (progesterone) steroid is hydrophobic so probably has to do
someting with that
15. Which experimental evidence suggests that the purified hMPR ±obtained
by the researchers was in its native state?: Dude. Just stop. C is the answer. It
literally says.
A. The tags that were used for extraction could still intefere with the protein's
native function/binding
16. A major obstacle to obtaining useful energy from a nuclear fusion
reactor is containment of the fuel at the very high temperatures required for
fusion. The reason such high temperatures are required is to:: A MAKES NO
SENSE WHY WOULD YOU USE HIGH TEMPS TO ELIMINATE THE NULEAR
FORCE charge is always conserved no matter the carge
C- the higher density the material, the closer the nucleic are to each oter
17. Enantiomers can exhibit a difference in which chemical or physical
property?: - Enantiomers retain most properties (density, boiling point, IR spect)
- The strong nuclear force is what holds a nucleus together, fusion would want a
strong nuclear force to hold the. protons together
18. Which classification of amino acids applies to the Trp residues after
photochemical modification by CCl3CO2H?: Carboxylic is an acid it is not
asking about trp in general but rather the residues
19. Based on the passage, what most likely causes W96 to be accessible
to CHCl3 at 75°C? A.
Peptide bonds are broken, releasing W96.
B.
Reduction of disulfide bonds occurs.
C.
The protein unfolds and exposes W96 to the buffer.
D.
CHCl3 extracts W96 from the protein interior.: Passage says: temperature which
fully denatures carbonic anhydrase but leaves its primary structure intact primary
structure= amino acids Peptide bonds are not broke
1. What is the chemical structure of a component found in four of the
five cofactors used by Na+-NQR?: says it is composed of flavin structure is
a nucleotide base structure B could be structure C also could be structure D is
an amino acid down between B and C
to help, look at the captioned note on the table. it says Fl represents flavin which is
the redox active center in four of the five cofactors of Na+-NQR
C has an uniquinone AND HERE IS IS MENTIONED THAT UNIQUINONE IS IS A
SUBSTATE
2. What is the ratio of cation to enzyme in the spectroelectrochemical
experiments described in the passage?: cation : enzyme
passage says Na+NQR was diluted to a final concentration of 0.75 mM in
0.150 molar of the cation ions cation .15 M:
3. The reaction between NADH and ubiquinone is exergonic, but the
reaction, when catalyzed by Na+-NQR, does not generate much heat in vivo.
What factor accounts for this difference?: Conservation of energy, it is not
created nor destroyed but merely changes forms
A. Is not possible, Even if it was heat generation would be larger for a catalyzed
rection.
C. is impossible, reactants have to be close together to react
The movement of a charged particle against its concentration gradient is
energetically costly.
4. Two open flasks I and II contain different volumes of the same liquid.
Suppose that the pressure is measured at a point 10 cm below the surface
of the liquid in each container. How will the pressures compare?:
pressure=pgh g=10
p= density (same liquid so same density) h=
10 cm
both have same height so pressure will be the same-- if heights were different
pressure would be different
5. Question
Which of the following substances is polar?: If there is a net dipole it is polar
6. Question
If all else is held constant, which of the following changes would NOT
double the volume of a gas?: pv=nrt
7. What is the number of neutrons in the nucleus of the atom used to
produce laser radiations?: 86Kr+ laser
, FL 5 AAMC MCAT
86= mass
Kr has proton number as 36
86-36=50
the cation or anion charge with any element is indicative of the charge aka
electron count
8. What is the molecular formula of the heterocyclic aromatic compound
pyrrole?: passage says its a tetra pyrrole so there are 4 carbons
9. The radiation of wavelength 605 nm CANNOT be used to produce the
fluorescence radiations depicted in Figure 3 because:: Maybe if you read the
passage for once in your life and not get confident then maybe you wouldn't have
to take the exam for a third time
Not D because look at the passage
not C because of E=hc/lambda (high wavelength low energy)
10. Approximately how many moles of Kr+ are contained in the laser tube
at 0°C and 1 atm?: Have to recognize STP conditions of 0 C and 1 atm (22.4 L)
Volume in PV=nrt is in L
1cm^3=1mL
11. The CD spectroscopy signal that was used to generate the data in
Figure 1 arises from the chirality of the:: look for what is chiral B is not
C is not
D- most beta carbons are not chiral
12. Samples from various time points of the proteolysis of TPMTwt were
subjected to SDS-PAGE under reducing conditions. Which figure best depicts
the expected appearance of the gel?: - For proteolysis, the protein is expected to
be broken up over time
- Small fragments will travel faster in the SDS-PAGE
A and B show that they are building up or oligermizing
13. If the combined mass of the TPMT substrate and cofactor was
determined before the enzymatically catalyzed reaction and then
compared to the combined mass of the product and the cofactor after
the reaction, the net change in molecular weight will be:: Passage says
that TPMT is an enzyme
(methyltransferase) can also think about the
conservation of mass balance equation on
products and reactants
, FL 5 AAMC MCAT
14. The structure of Compound 2 is shown.
Compound 2
What structural feature(s) is(are) most important to the functioning of this
compound as described in the passage?: - Compound 2 helped extract the
receptor
- Receptor is MPR (progesterone) steroid is hydrophobic so probably has to do
someting with that
15. Which experimental evidence suggests that the purified hMPR ±obtained
by the researchers was in its native state?: Dude. Just stop. C is the answer. It
literally says.
A. The tags that were used for extraction could still intefere with the protein's
native function/binding
16. A major obstacle to obtaining useful energy from a nuclear fusion
reactor is containment of the fuel at the very high temperatures required for
fusion. The reason such high temperatures are required is to:: A MAKES NO
SENSE WHY WOULD YOU USE HIGH TEMPS TO ELIMINATE THE NULEAR
FORCE charge is always conserved no matter the carge
C- the higher density the material, the closer the nucleic are to each oter
17. Enantiomers can exhibit a difference in which chemical or physical
property?: - Enantiomers retain most properties (density, boiling point, IR spect)
- The strong nuclear force is what holds a nucleus together, fusion would want a
strong nuclear force to hold the. protons together
18. Which classification of amino acids applies to the Trp residues after
photochemical modification by CCl3CO2H?: Carboxylic is an acid it is not
asking about trp in general but rather the residues
19. Based on the passage, what most likely causes W96 to be accessible
to CHCl3 at 75°C? A.
Peptide bonds are broken, releasing W96.
B.
Reduction of disulfide bonds occurs.
C.
The protein unfolds and exposes W96 to the buffer.
D.
CHCl3 extracts W96 from the protein interior.: Passage says: temperature which
fully denatures carbonic anhydrase but leaves its primary structure intact primary
structure= amino acids Peptide bonds are not broke
