Order Amino Acids and Proteins Discussion

Order Amino Acids and Proteins Discussion
Order Amino Acids and Proteins Discussion
 
Passage 1: Questions 1–5
Researchers were investigating molecular activity under a variety of environmental conditions. After a series of experiments, the data were used to construct
a number of figures, one of which is provided below. However, because of a
data stream transmission error, some of the components of the figures were lost,
resulting in a scrambling of the figure descriptions and axis scales. Your job is
to properly reconstruct and interpret the figures. Please note that one or more
options might fulfill the defined criteria as provided.
A
B
D
E
C
1. One of the experiments dealt with the isolation and characterization
of selected enzymes isolated from a newly defined species of archaeobacteria. For this set of data, which of the following would be the most
appropriate legend and scale for “A”?
(A) Enzyme density (ng/mL)
(B) Relative enzyme activity (mol/sec)
(C) Reaction product produced (mL/sec)
(D) System free energy (cal/ng reactants)
Order Amino Acids and Proteins Discussion
2 › McGraw-Hill Education 500 MCAT: Biology
2. For the same experiment as in Question 1 dealing with the isolation and
characterization of selected enzymes isolated from a newly defined species
of archaeobacteria, which would be the most appropriate legend and scale
for “B”?
(A) pH (2–9)
(B) Temperature (–40– 60°C)
(C) Temperature (70–140°C)
(D) A and C
3. One of the experiments dealt with the absorption spectra of isolated
photoreactive pigments. For this set of data, which of the following would
be the most appropriate legend and scale for “A”?
(A) Percentage absorbance at 400 nm
(B) Percentage of molecules activated (ng/sec)
(C) Percentage absorbance
(D) Percentage transmittance
4. For the same experiment as in Question 3 dealing with the isolation and
characterization of selected photoreactive pigments isolated from a newly
defined species of archaeobacteria, which would be the most appropriate
legend and scale for “B”?
(A) Energy absorbed (kPa/ng)
(B) Wavelength (300–600 nm)
(C) Percentage absorbance
(D) Emission spectrum (300–600 nm)
5. Given that the scale for “B” includes only visible light from lower to higher
energy from left to right, and the scale for “A” measures absorbance, which
of the following would be true?
(A) Pigment “C” absorbs red and orange light the least.
(B) Pigment “E” reflects green light the most.
(C) The wavelengths absorbed by pigment “E” most resemble those of
chlorophyll.
(D) Pigment “D” absorbs blue light the most.
6. A competitive inhibitor
(A) binds at a site other than the active site.
(B) cannot be processed by the enzyme.
(C) irreversibly binds and inactivates the enzyme.
(D) does not inhibit enzyme activity, but lowers substrate concentration.
(E) binds to and inactivates the substrate.
Amino Acids and Proteins ‹ 3
7. A person with a bacterial infection usually develops a fever. This fever helps
protect the person by inhibiting the growth of bacteria because
(A) bacteria reproduce more rapidly at higher body temperatures.
(B) fever blocks the synthesis of proteins in bacteria.
(C) the higher temperature increases the metabolic rate of bacteria.
(D) sweating removes cofactors required by bacteria from the blood.
(E) enzymes do not function as well at temperatures other than that
which is optimal.
Order Amino Acids and Proteins Discussion
8. If a small molecule that acts as a substrate for a specific enzyme was modified by being coupled to a larger molecule before the reaction could occur,
what would be the most likely result?
(A) The reaction catalyzed by the enzyme would progress in the normal fashion because the part of the molecule that interacts with the
enzyme remains substantially unchanged.
(B) The rate of the reaction would increase because of the additional mass
of the reactant.
(C) The rate of the reaction would increase because the additional molecular
structure would act as a cofactor.
(D) The enzyme would be permanently disabled by the larger portion of
the substrate molecule.
(E) The enzyme would not be able to interact with the modified
substrate.
9. Complement is a series of blood proteins best associated with
(A) initiation of blood clotting.
(B) regulation of blood clotting.
(C) platelets.
(D) cellular lysis.
(E) apoptosis.
10. If a person undergoes a process whereby selected plasma proteins are
removed (plasmapheresis), then that person
(A) is attempting to help someone with chronic infections.
(B) is attempting to help someone with hemophilia.
(C) probably has a chronic infection.
(D) has a large fluid regulatory problem.
(E) is undergoing therapy for leukemia.
Having a hard time figuring out how to do your assignment?
Ask our experts for help and get it done in no time!

Still stressed from student homework?
Get quality assistance from academic writers!
Open chat
1
You can contact our live agent via WhatsApp! Via + 1 9294730077

Feel free to ask questions, clarifications, or discounts available when placing an order.

Order your essay today and save 20% with the discount code HURRAY