100% CORRECT ANSWERS
Le Chatelier's Principle - correct answer States that if a stress is applied to a
system at equilibrium, the system shifts in the direction that relieves the stress.
Bose-Einstein Principle - correct answer states that a collection of atoms cooled
close to absolute zero will coalesce into a single quantum state
Heisenberg uncertainty principle - correct answer States that one cannot known
both the momentum and position of an object with absolute certainty
Pauli Exclusion Principle - correct answer States that two or more identical
fermions, e.g. electrons, cannot occupy the same quantum state
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? - correct answer The movement of a charged particle against its
concentration gradient is energetically costly. Coupling the two processes: the
redox reaction between NADH and ubiquinone and the movement of Na+ up a
concentration gradient makes the overall process less exothermic.
If all else is held constant, which of the following changes would NOT double the
volume of a gas - correct answer Based on Boyle's Law, P is inversely proportional
to volume, thus, doubling the pressure of a gas sample will decrease, not increase,
the volume.
What is the molecular formula of the heterocyclic aromatic compound pyrrole? -
correct answer C4H5N
How many Liters are in 1 mol of gas? - correct answer 22.4 L
How does fluorescence occur? - correct answer Fluorescence can occur when the
absorbed radiation has a photon energy larger than the photon energy of the
radiation emitted through fluorescence.
, A major obstacle to obtaining useful energy from a nuclear fusion reactor is
containment of the fuel at the very high temperatures required for fusion. The
reason such high temperatures are required is to: - correct answer enable reactants
to approach within range of the strong nuclear force.
Enantiomers can exhibit a difference in which chemical or physical property -
correct answer Enantiomers have the same physical and chemical properties. They
differ only in their three dimensional arrangement of atoms and their interactions
with other chiral molecules. They can differ in their smell due to interacting
differently with chiral odorant receptors.
Blood Flow Speed - correct answer
V= Q/A A= Pi*r^2
Which of the following species has an electron configuration equivalent to that of a
noble gas
A. Ca2+
B. Cu2
+ C.O
D.H - correct answer Ca2+ has lost its valence electrons and thus attains the
electronic configuration of the previous noble gas (Ar).
Copper has 11 outer electrons. Loss of 2 electrons.
positive cooperativity - correct answer the first substrate changes the shape of the
enzyme allowing other substrates to bind more easily
A 2 kg mass and a 5 kg mass are connected by a massless cord suspended over a
massless and frictionless pulley. If the acceleration due to gravity is g, what will be
the acceleration of the masses after they are released from rest? - correct answer
According to Newton's second law, the net force acting on the 5-kg mass is given by
the expression Fnet= 5 kg × a1 = 5 kg × g - T, where a1 is the acceleration after
the release and T is the tension in the cord. The net force acting on the 2-kg mass is
given by the expression Fnet= 2 kg × a2 = 2 kg × g - T. Because the two masses
move simultaneously but in opposite directions after they are released, a1 = -a2 =
a. Substituting the expression T = 5 kg × (g - a) into the equation of motion of the
2-kg mass yields -2 kg × a = 2 kg × g - 5 kg × (g - a) = -3 kg × g + 5 kg × a. Then
7 kg × a = 3 kg × g, hence a = 3g/7.