BCH 463 : BIOPHYSICAL CHEMISTRY FINAL
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+
QUESTION 1
Which law explains the relationship between gas pressure
and volume at constant temperature?
A. Charles’ Law
✔ B. Boyle’s Law
C. Avogadro’s Law
D. Hess’s Law
Answer: ✔ Boyle’s Law
,Explanation: Boyle’s Law states that pressure is inversely
proportional to volume at constant temperature (P₁V₁ =
P₂V₂).
QUESTION 2
What is the SI unit of Gibbs free energy?
A. Joule
✔ B. Joule per mole
C. Newton
D. Pascal
Answer: ✔ Joule per mole
Explanation: Gibbs free energy is energy per mole of
substance.
QUESTION 3
Which force stabilizes protein secondary structure?
,A. Ionic bonds
✔ B. Hydrogen bonds
C. Covalent bonds
D. Metallic bonds
Answer: ✔ Hydrogen bonds
Explanation: Alpha helices and beta sheets are stabilized by
hydrogen bonding between backbone atoms.
QUESTION 4
What is the main driving force of protein folding?
A. Electrostatic repulsion
✔ B. Hydrophobic effect
C. Covalent bonding
D. Nuclear force
Answer: ✔ Hydrophobic effect
, Explanation: Nonpolar amino acids cluster inward to avoid
water.
QUESTION 5
Which equation defines pH?
A. pH = log[H⁺]
✔ B. pH = -log[H⁺]
C. pH = [H⁺]²
D. pH = ln[H⁺]
Answer: ✔ pH = -log[H⁺]
Explanation: pH measures hydrogen ion concentration on a
logarithmic scale.
QUESTION 6
Which biomolecule shows primary structure?
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+
QUESTION 1
Which law explains the relationship between gas pressure
and volume at constant temperature?
A. Charles’ Law
✔ B. Boyle’s Law
C. Avogadro’s Law
D. Hess’s Law
Answer: ✔ Boyle’s Law
,Explanation: Boyle’s Law states that pressure is inversely
proportional to volume at constant temperature (P₁V₁ =
P₂V₂).
QUESTION 2
What is the SI unit of Gibbs free energy?
A. Joule
✔ B. Joule per mole
C. Newton
D. Pascal
Answer: ✔ Joule per mole
Explanation: Gibbs free energy is energy per mole of
substance.
QUESTION 3
Which force stabilizes protein secondary structure?
,A. Ionic bonds
✔ B. Hydrogen bonds
C. Covalent bonds
D. Metallic bonds
Answer: ✔ Hydrogen bonds
Explanation: Alpha helices and beta sheets are stabilized by
hydrogen bonding between backbone atoms.
QUESTION 4
What is the main driving force of protein folding?
A. Electrostatic repulsion
✔ B. Hydrophobic effect
C. Covalent bonding
D. Nuclear force
Answer: ✔ Hydrophobic effect
, Explanation: Nonpolar amino acids cluster inward to avoid
water.
QUESTION 5
Which equation defines pH?
A. pH = log[H⁺]
✔ B. pH = -log[H⁺]
C. pH = [H⁺]²
D. pH = ln[H⁺]
Answer: ✔ pH = -log[H⁺]
Explanation: pH measures hydrogen ion concentration on a
logarithmic scale.
QUESTION 6
Which biomolecule shows primary structure?
