TEST BANK FOR
BIOCHEMISTRY,
CAMPBELL –
COMPLETE -
EXAM
QUESTIONS
WITH ANSWERS
KEY
Page 1
,1. THE DIPOLE MOMENT IN A WATER MOLECULE WHICH STATEMENT
ABOUT HYDROGEN BONDS IS NOT TRUE?
A) HYDROGEN BONDS ACCOUNT FOR THE ANOMALOUSLY HIGH BOILING
POINT OF WATER.
B) IN LIQUID WATER, THE AVERAGE WATER MOLECULE FORMS
HYDROGEN BONDS WITH THREE TO FOUR OTHER WATER
MOLECULES.
C) INDIVIDUAL HYDROGEN BONDS ARE MUCH WEAKER THAN
COVALENT BONDS.
D) INDIVIDUAL HYDROGEN BONDS IN LIQUID WATER EXIST FOR MANY
SECONDS AND SOMETIMES FOR MINUTES.
E) THE STRENGTH OF A HYDROGEN BOND DEPENDS ON THE
LINEARITY OF THE THREE ATOMS INVOLVED IN THE BOND.
2. A TRUE STATEMENT ABOUT HYDROPHOBIC INTERACTIONS IS THAT THEY:
A) ARE THE DRIVING FORCE IN THE FORMATION OF MICELLES OF
AMPHIPATHIC COMPOUNDS IN WATER.
B) DO NOT CONTRIBUTE TO THE STRUCTURE OF WATER-SOLUBLE
PROTEINS.
C) HAVE BONDING ENERGIES OF APPROXIMATELY 20–40 KJOULE PER
MOLE.
D) INVOLVE THE ABILITY OF WATER TO DENATURE PROTEINS.
E) PRIMARILY INVOLVE THE EFFECT OF POLAR SOLUTES ON THE
ENTROPY OF AQUEOUS SYSTEMS.
3. HYDROPHOBIC INTERACTIONS MAKE IMPORTANT ENERGETIC
CONTRIBUTIONS TO:
A) BINDING OF A HORMONE TO ITS RECEPTOR PROTEIN.
B) ENZYME-SUBSTRATE INTERACTIONS.
C) MEMBRANE STRUCTURE.
D) THREE-DIMENSIONAL FOLDING OF A POLYPEPTIDE CHAIN.
E) ALL OF THE ANSWERS ARE CORRECT.
4. DISSOLVED SOLUTES ALTER SOME PHYSICAL (COLLIGATIVE)
PROPERTIES OF THE SOLVENT WATER BECAUSE THEY CHANGE
THE:
A) CONCENTRATION OF THE WATER.
Page 2
,B) HYDROGEN BONDING OF THE WATER.
C) IONIC BONDING OF THE WATER.
D) PH OF THE WATER.
Page 3
, E) TEMPERATURE OF THE WATER.
5. OSMOSIS IS MOVEMENT OF A:
A) CHARGED SOLUTE MOLECULE (ION) ACROSS A MEMBRANE.
B) GAS MOLECULE ACROSS A MEMBRANE.
C) NONPOLAR SOLUTE MOLECULE ACROSS A MEMBRANE.
D) POLAR SOLUTE MOLECULE ACROSS A MEMBRANE.
E) WATER MOLECULE ACROSS A MEMBRANE.
6. A HYDRONIUM ION:
A) HAS THE STRUCTURE H3O+.
B) IS A HYDRATED HYDROGEN ION.
C) IS A HYDRATED PROTON.
D) IS THE USUAL FORM OF ONE OF THE DISSOCIATION PRODUCTS OF
WATER IN SOLUTION.
E) ALL OF THE ANSWERS ARE CORRECT.
7. THE PH OF A SOLUTION OF 1 M HCL IS:
A) 0.
B) 0.1.
C) 1.
D) 10.
E) –1.
8. THE PH OF A SOLUTION OF 0.1 M NAOH IS:
A) 0.1.
B) 1.0.
C) 12.8.
D) 13.
E) 14.
Page 4
BIOCHEMISTRY,
CAMPBELL –
COMPLETE -
EXAM
QUESTIONS
WITH ANSWERS
KEY
Page 1
,1. THE DIPOLE MOMENT IN A WATER MOLECULE WHICH STATEMENT
ABOUT HYDROGEN BONDS IS NOT TRUE?
A) HYDROGEN BONDS ACCOUNT FOR THE ANOMALOUSLY HIGH BOILING
POINT OF WATER.
B) IN LIQUID WATER, THE AVERAGE WATER MOLECULE FORMS
HYDROGEN BONDS WITH THREE TO FOUR OTHER WATER
MOLECULES.
C) INDIVIDUAL HYDROGEN BONDS ARE MUCH WEAKER THAN
COVALENT BONDS.
D) INDIVIDUAL HYDROGEN BONDS IN LIQUID WATER EXIST FOR MANY
SECONDS AND SOMETIMES FOR MINUTES.
E) THE STRENGTH OF A HYDROGEN BOND DEPENDS ON THE
LINEARITY OF THE THREE ATOMS INVOLVED IN THE BOND.
2. A TRUE STATEMENT ABOUT HYDROPHOBIC INTERACTIONS IS THAT THEY:
A) ARE THE DRIVING FORCE IN THE FORMATION OF MICELLES OF
AMPHIPATHIC COMPOUNDS IN WATER.
B) DO NOT CONTRIBUTE TO THE STRUCTURE OF WATER-SOLUBLE
PROTEINS.
C) HAVE BONDING ENERGIES OF APPROXIMATELY 20–40 KJOULE PER
MOLE.
D) INVOLVE THE ABILITY OF WATER TO DENATURE PROTEINS.
E) PRIMARILY INVOLVE THE EFFECT OF POLAR SOLUTES ON THE
ENTROPY OF AQUEOUS SYSTEMS.
3. HYDROPHOBIC INTERACTIONS MAKE IMPORTANT ENERGETIC
CONTRIBUTIONS TO:
A) BINDING OF A HORMONE TO ITS RECEPTOR PROTEIN.
B) ENZYME-SUBSTRATE INTERACTIONS.
C) MEMBRANE STRUCTURE.
D) THREE-DIMENSIONAL FOLDING OF A POLYPEPTIDE CHAIN.
E) ALL OF THE ANSWERS ARE CORRECT.
4. DISSOLVED SOLUTES ALTER SOME PHYSICAL (COLLIGATIVE)
PROPERTIES OF THE SOLVENT WATER BECAUSE THEY CHANGE
THE:
A) CONCENTRATION OF THE WATER.
Page 2
,B) HYDROGEN BONDING OF THE WATER.
C) IONIC BONDING OF THE WATER.
D) PH OF THE WATER.
Page 3
, E) TEMPERATURE OF THE WATER.
5. OSMOSIS IS MOVEMENT OF A:
A) CHARGED SOLUTE MOLECULE (ION) ACROSS A MEMBRANE.
B) GAS MOLECULE ACROSS A MEMBRANE.
C) NONPOLAR SOLUTE MOLECULE ACROSS A MEMBRANE.
D) POLAR SOLUTE MOLECULE ACROSS A MEMBRANE.
E) WATER MOLECULE ACROSS A MEMBRANE.
6. A HYDRONIUM ION:
A) HAS THE STRUCTURE H3O+.
B) IS A HYDRATED HYDROGEN ION.
C) IS A HYDRATED PROTON.
D) IS THE USUAL FORM OF ONE OF THE DISSOCIATION PRODUCTS OF
WATER IN SOLUTION.
E) ALL OF THE ANSWERS ARE CORRECT.
7. THE PH OF A SOLUTION OF 1 M HCL IS:
A) 0.
B) 0.1.
C) 1.
D) 10.
E) –1.
8. THE PH OF A SOLUTION OF 0.1 M NAOH IS:
A) 0.1.
B) 1.0.
C) 12.8.
D) 13.
E) 14.
Page 4
