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Chemical & Physical Foundations of Biological Systems MCAT questions with correct answers
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In a barometer: if the external air force outweighs the weight of the mercury, then the column ______. If the external air force is less than the weight of the mercury, the column _____. Correct Answer-rises, drops proteins Correct Answer-amides are the functional groups present in: fructose-...

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  • October 6, 2024
  • 64
  • 2024/2025
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  • chemical physical foundations of biological syst

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Chemical & Physical Foundations of Biological
Systems MCAT questions with correct answers
In a barometer: if the external air force outweighs the weight of the
mercury, then the column ______. If the external air force is less than
the weight of the mercury, the column _____. Correct Answer-rises,
drops


proteins Correct Answer-amides are the functional groups present in:


fructose-6-phosphate, glyceraldehyde-3-phosphate, NADPH, ribose-5-
phosphate Correct Answer-list all the products of the PPP:


going down periodic table due to greater size and polarizability Correct
Answer-Nucleophilicity periodic trend increases:


sugars Correct Answer-hemiacetals are present in:


ester Correct Answer-triglycerides contain which functional groups


STP conditions used for gas calculations Correct Answer-273 K, 1 atm


Standard State, used for measuring standard enthalpy, entropy, free
energy changes, and electrochemical cell-voltage Correct Answer-298
K, 1 atm, 1 M

,In gases the particles have a lot of energy. This means that they are not
tightly packed and can move apart. Gases can be compressed because
the particles can be forced closer together. Correct Answer-Why are gas
phases more compressible than liquid or solid phases?


Combined gas law Correct Answer-P1V1/T1 = P2V2/T2


A mole of an ideal gas at STP occupies Correct Answer-22.4 L


Doubling the temperature of a gas would result in ____ its volume?
Doubling the pressure of a gas would result in _____ the volume?
Doubling both the temperature and pressure at the same time results in a
final volume that is ____ to the original volume? Correct Answer-
doubling, halving, equal


Avogado's Principle states Correct Answer-volume & gas are directly
proportional, equal volumes of all gases, at the same temperature and
pressure, have the same number of molecules


Boyle's Law states that Correct Answer-the volume of a gas is inversely
proportional to its pressure


Charle's Law states that Correct Answer-at constant pressure, the
volume of a gas is directly proportional to its absolute temperature

,Gay-Lussac's Law, complementary to Charle's Law, states that Correct
Answer-pressure of a gas is directly proportional to its absolute
temperature


Dalton's Law of Partial Pressures Correct Answer-mole fraction x total
pressure


The mole fraction (Xa) Correct Answer-moles of a gas A/ total moles of
a gas


According to Henry's Law, the Vapor Pressure is the pressure exerted by
Correct Answer-evaporated particles above the surface of a liquid


What are the assumptions of the Kinetic Molecular Theory Correct
Answer-Gas particles have negligible volume
Gas particles do not undergo IMF or repulsions
Gas particles undergo collisions w each other & container
Collisions between the gases & the walls are elastic
Average kinetic energy of gas particles is proportional to T


What does it mean for a collision to be elastic? Correct Answer-The
Kinetic Energy and momentum are conserved


Average Molecular Speed Correct Answer-average KE of a particle is
proportional to the absolute temperature of the gas

, molecules move from high to low concentrations in Correct Answer-
diffusion


gases move through a small hole under pressure in Correct Answer-
effusion


heavier gases diffuse more ____ than lighter gases because of their
differing ______ _____ Correct Answer-slowly, average speeds


rate of effusion of a gas is inversely proportional to the square root of
the mass of its particles under isobaric/isothermic conditions Correct
Answer-Graham's Law


Gases deviate from ideal gas conditions at Correct Answer-high pressure
(low volume) or low temperature


_____ is a liquid to solid transition, _____ is a gas to liquid transition,
and _____ is a solid to gas transition. Correct Answer-Crystallization,
condensation, sublimation


Equation for energy involved in phase change Correct Answer-q = Hfn.


Sulfuric acid has several hydrogen bond donating and accepting sites,
making it a _____ molcule Correct Answer-Hygroscopic

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