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FL 5 AAMC MCAT Exam Latest Questions with Correct Answers.
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FL 5 AAMC MCAT Exam Latest Questions with Correct Answers.FL 5 AAMC MCAT Exam Latest Questions with Correct Answers.
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FL 5 AAMC MCAT Exam Latest Questions withCorrect Answers.
What is the chemical structure of a component found in four of the five cofactors used
by Na+-NQR? - ANS 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
What is the ratio of cation to enzyme in the spectroelectrochemical experiments
described in the passage? - ANS 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:
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? - ANS 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.
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? - ANS 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
Question
Which of the following substances is polar? - ANS If there is a net dipole it is polar
Question
, If all else is held constant, which of the following changes would NOT double the
volume of a gas? - ANS pv=nrt
What is the number of neutrons in the nucleus of the atom used to produce laser
radiations? - ANS 86Kr+ laser
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
What is the molecular formula of the heterocyclic aromatic compound pyrrole? - ANS
passage says its a tetra pyrrole so there are 4 carbons
The radiation of wavelength 605 nm CANNOT be used to produce the fluorescence
radiations depicted in Figure 3 because: - ANS 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)
Approximately how many moles of Kr+ are contained in the laser tube at 0°C and 1
atm? - ANS Have to recognize STP conditions of 0 C and 1 atm (22.4 L)
Volume in PV=nrt is in L
1cm^3=1mL
The CD spectroscopy signal that was used to generate the data in Figure 1 arises from
the chirality of the: - ANS look for what is chiral
B is not
C is not
D- most beta carbons are not chiral
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? - ANS - 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
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: -
ANS Passage says that TPMT is an enzyme (methyltransferase)
can also think about the conservation of mass
balance equation on products and reactants
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