COMPLETE SOLUTIONS!!
, B.
Based on the Reaction 1, pyruvate and acetyl phosphate are the reactant and
product of the reaction, respectively. Le Châtelier's principle states that
increasing the concentration of a reactant will increase the concentration of a
product at equilibrium.
D.
Tight junctions are intracellular junctions that prevent the movement of solutes
within the space between adjacent cells. In blood capillaries, neighboring
endothelial cells form tight junctions with one another to restrict the diffusion of
harmful substances and large molecules into the intestinal fluid surrounding the
brain.
B.
The separation between the energy level equals the energy of the photon. The
energy of the photon is inversely proportional to the wavelength. The longest
wavelength corresponds to the smallest photon energy, which corresponds to
the transition between the closest energy levels.
B.
A negative control is the one that is performed in the conditions that are
not expected to give positive results. Thus, unconditioned media will need
to be used. As antibodies are highly specific, if 53BP1 and γH2AX are
detected in the negative control, this means that AEC are present.
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2 of 116
Term
,Based on the information in the passage, compounds 1-3 are what
type of inhibitor?
A. competitive
B. mixed
C. product
D. irreversible
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B.
CPT1 is an essential enzyme in the carnitine shuttle, transporting fatty acids into
the mitochondria for oxidation. The absence of CPT1 would prevent the transport
of fatty acids into the mitochondria for oxidation, irrespective of the presence or
absence of ACC2.
B.
The passage states that compounds 1-3 can bind to RT both before and
after the substrate has bound. Also, the compounds do not exclude
substrate binding therefore mixed inhibition is most likely.
C.
The passage notes that CCK triggers satiety centers within the brain upon
ingestion of food and thereby induces a sensation indicating that enough food
has been eaten. This graph shows that the CCK-treated rats eat less than the
control rats.
B.
Figure 1 shows that the TP substrate binds first without any catalysis occurring
and then the dNTP substrate binds. This is an ordered mechanism.
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3 of 116
Term
Which variant of DNA polymerase will most likely retain catalytic
activity
A. D429A
B. D429E
C. D429L
D. D429F
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B.
Since the side chain carboxylate groups bind the metal ions, the only
variant that would retain this function is D429E.
B.
Obese individuals have more energy stores than lean individuals. For this reason,
the levels of gherlin, which increases appetite, are lower in obese individuals
A.
When threshold is met at the axon hillock, voltage-gated sodium channels open,
generating an action potential.