FL 5 AAMC MCAT exam questions with answers

FL 5 AAMC MCAT exam questions with
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answers

What is the chemical structure of a component found in four of the
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five cofactors used by Na+-NQR? - CORRECT ANSWERS ✔✔says it
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is composed of flavin
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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
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represents flavin which is the redox active center in four of the five
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cofactors of Na+-NQR
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C has an uniquinone AND HERE IS IS MENTIONED THAT
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UNIQUINONE IS IS A SUBSTATE |\ |\ |\ |\




What is the ratio of cation to enzyme in the
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spectroelectrochemical experiments described in the passage? - |\ |\ |\ |\ |\ |\ |\



CORRECT ANSWERS ✔✔cation : enzyme |\ |\ |\ |\




passage says Na+NQR was diluted to a final concentration of 0.75
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mM in 0.150 molar of the cation ions
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cation .15 M: |\ |\




The reaction between NADH and ubiquinone is exergonic, but the
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reaction, when catalyzed by Na+-NQR, does not generate much
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,heat in vivo. What factor accounts for this difference? - CORRECT
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ANSWERS ✔✔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
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for a catalyzed rection.
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C. is impossible, reactants have to be close together to react
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The movement of a charged particle against its concentration
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gradient is energetically costly. |\ |\ |\




Two open flasks I and II contain different volumes of the same
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liquid. Suppose that the pressure is measured at a point 10 cm
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below the surface of the liquid in each container. How will the
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pressures compare? - CORRECT ANSWERS ✔✔pressure=pgh |\ |\ |\ |\ |\




g=10
p= density (same liquid so same density)
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h= 10 cm |\ |\ |\




both have same height so pressure will be the same-- if heights
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were different pressure would be different
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Question
Which of the following substances is polar? - CORRECT ANSWERS
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✔✔If there is a net dipole it is polar
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Question
If all else is held constant, which of the following changes would
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NOT double the volume of a gas? - CORRECT ANSWERS ✔✔pv=nrt
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, What is the number of neutrons in the nucleus of the atom used to
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produce laser radiations? - CORRECT ANSWERS ✔✔86Kr+ laser
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86= mass |\ |\




Kr has proton number as 36
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86-36=50 |\




the cation or anion charge with any element is indicative of the
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charge aka electron count |\ |\ |\




What is the molecular formula of the heterocyclic aromatic
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compound pyrrole? - CORRECT ANSWERS ✔✔passage says its a |\ |\ |\ |\ |\ |\ |\ |\ |\



tetra pyrrole so there are 4 carbons
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The radiation of wavelength 605 nm CANNOT be used to produce
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the fluorescence radiations depicted in Figure 3 because: -
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CORRECT ANSWERS ✔✔Maybe if you read the passage for once in
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your life and not get confident then maybe you wouldn't have to
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take the exam for a third time
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Not D because look at the passage
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not C because of E=hc/lambda (high wavelength low energy)
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Approximately how many moles of Kr+ are contained in the laser |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



tube at 0°C and 1 atm? - CORRECT ANSWERS ✔✔Have to
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recognize STP conditions of 0 C and 1 atm (22.4 L) |\ |\ |\ |\ |\ |\ |\ |\ |\ |\




Volume in PV=nrt is in L |\ |\ |\ |\ |\




1cm^3=1mL