BMSC 230 Midterm Test Questions and Answers
First Law of Thermodynamics Correct Ans-In any physical or chemical change the total
amount of energy in the universe remains constant.
Second Law of Thermodynamics Correct Ans-The amount of entropy (total disorder) in the
environment increase as a result of all chemical or physical changes.
Free Energy Correct Ans-The kind of energy that performs useful work at constant
temperature and pressure
Exergonic Correct Ans-If DeltaG is negative. The initial state's energy level of reactant(s) is
higher than the final product
Endergonic Correct Ans-If DeltaG is positive, means that the initial state's energy level of
reactant(s) is lower than the final product.
Heat Energy (H) Correct Ans-Total heat content (energy) of a system referred as enthalpy
occurs through a change of temperature and pressure.
Entropy (s) Correct Ans-Energy in a state of randomness and disorder (useless)
The hydrolysis of ATP is ___________ because the triphosphate unit contains 2
phosphoanhydride bonds that are unstable. Correct Ans-exergonic
, BMSC 230 Midterm Test Questions and Answers
If you want a reaction to be irreversible you would hydrolyze ATP to __________________
Correct Ans-AMP + PPi
ATP has a high phosphoryl- transfer potential because of three key factors: Correct Ans-1.
Charge repulsion
2. Resonance Stability
3. Stabilization by hydration
Oxidation Correct Ans-Loss of electrons and some times also protons
Reduction Correct Ans-Gain of electrons and sometimes also promise
Reduction Potential (E) Correct Ans-Measures affinity for electrons, unit in volts, standard
reduction potential, E^o , standard reduction potential at PRIME condition (zero) is at pH 7.
Electrons move from LOWER E^o to HIGHER E^o
More negative volts has a ____________ affinity for electrons. Correct Ans-Lower
More positive number has a higher affinity for electrons.
0V- H2 has no affinity for electrons.
Faraday's constant (F) Correct Ans-96.5kJ/volt/mol
, BMSC 230 Midterm Test Questions and Answers
If E^o net is a positive vile, deltaG^o' will be: Correct Ans-A negative value ( means a
spontaneous reaction and exergonic)
E^o'net= E^o(for reduction reaction) - E^o( for oxidation reaction)
B12
Coenzyme Correct Ans-Cobalamin
5'-Deoxyadenosyl cobalamin
B9
Coenzyme Correct Ans-Folic Acid
Tetrahydrofolate
B7
Coenzyme Correct Ans-Biotin
Biotin-lysine adducts (biocytin)
B5
Coenzyme Correct Ans-Pantothenic acid
Coenzyme A
B3
First Law of Thermodynamics Correct Ans-In any physical or chemical change the total
amount of energy in the universe remains constant.
Second Law of Thermodynamics Correct Ans-The amount of entropy (total disorder) in the
environment increase as a result of all chemical or physical changes.
Free Energy Correct Ans-The kind of energy that performs useful work at constant
temperature and pressure
Exergonic Correct Ans-If DeltaG is negative. The initial state's energy level of reactant(s) is
higher than the final product
Endergonic Correct Ans-If DeltaG is positive, means that the initial state's energy level of
reactant(s) is lower than the final product.
Heat Energy (H) Correct Ans-Total heat content (energy) of a system referred as enthalpy
occurs through a change of temperature and pressure.
Entropy (s) Correct Ans-Energy in a state of randomness and disorder (useless)
The hydrolysis of ATP is ___________ because the triphosphate unit contains 2
phosphoanhydride bonds that are unstable. Correct Ans-exergonic
, BMSC 230 Midterm Test Questions and Answers
If you want a reaction to be irreversible you would hydrolyze ATP to __________________
Correct Ans-AMP + PPi
ATP has a high phosphoryl- transfer potential because of three key factors: Correct Ans-1.
Charge repulsion
2. Resonance Stability
3. Stabilization by hydration
Oxidation Correct Ans-Loss of electrons and some times also protons
Reduction Correct Ans-Gain of electrons and sometimes also promise
Reduction Potential (E) Correct Ans-Measures affinity for electrons, unit in volts, standard
reduction potential, E^o , standard reduction potential at PRIME condition (zero) is at pH 7.
Electrons move from LOWER E^o to HIGHER E^o
More negative volts has a ____________ affinity for electrons. Correct Ans-Lower
More positive number has a higher affinity for electrons.
0V- H2 has no affinity for electrons.
Faraday's constant (F) Correct Ans-96.5kJ/volt/mol
, BMSC 230 Midterm Test Questions and Answers
If E^o net is a positive vile, deltaG^o' will be: Correct Ans-A negative value ( means a
spontaneous reaction and exergonic)
E^o'net= E^o(for reduction reaction) - E^o( for oxidation reaction)
B12
Coenzyme Correct Ans-Cobalamin
5'-Deoxyadenosyl cobalamin
B9
Coenzyme Correct Ans-Folic Acid
Tetrahydrofolate
B7
Coenzyme Correct Ans-Biotin
Biotin-lysine adducts (biocytin)
B5
Coenzyme Correct Ans-Pantothenic acid
Coenzyme A
B3
