©Themoon EXAM SOLUTIONS
18/11/2024 17:20PM
Biochemistry Testbank 1 Exam Questions
and Answers
lipids, nucelotides, monosaccharides, amino acids - Answers✓✓What are the four major classes
of molecules studied in biochemistry (in monomeric form)?
carbohydrates - Answers✓✓Polymers of sugars are __________.
proteins - Answers✓✓Amino acids are the building blocks of _________.
pH = pKa + log([A-]/[HA]) - Answers✓✓What is the Henderson-Hasselbalch equation?
tris acid (HCl), tris base - Answers✓✓[HA] is the _____________ and [A-] is the
____________.
B) carbon - Answers✓✓Which of the following is the most abundant element in the human
body?
A) nitrogen
B) carbon
C) oxygen
D) phosphorous
E) none of the above
, ©Themoon EXAM SOLUTIONS
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D) lipids - Answers✓✓Which of the major types of biomolecules is never found in a polymeric
form?
A) amino acids
B) carbohydrates
C) nucleotides
D) lipids
E) none of the above
B) polysaccharide: glycosidic bond - Answers✓✓Which of the following biopolymers is
correctly paired with the bond that forms between the monomers?
A) protein: ester bond
B) polysaccharide: glycosidic bond
C) DNA: phosphate bond
D) RNA: phosphate bondE)all of the above
D) polysaccharide: energy storage - Answers✓✓Which of the biopolymers is correctly paired
with its major function?
A) protein: information encoding
B) nucleic acids: energy storage
C) lipids: information encoding
D) polysaccharide: energy storage
E) none of the above
A) nucleic acids - Answers✓✓The similarity of one organism to another (for example a bacteria
versus a human) is most easily done by comparing which biopolymer?
A) nucleic acids
B) polysaccharides
C) proteins
, ©Themoon EXAM SOLUTIONS
18/11/2024 17:20PM
D) lipids
E) all of the above
D) positive; negative - Answers✓✓In a water molecule, hydrogens are partially _____; oxygens
are partially _____.
A) negative; negative
B) negative; positive
C) positive; positive
D) positive; negative
E) none of the above
A) two ; one H-bond donor, one H-bond acceptor - Answers✓✓At any given moment, a single
water molecule participates in _____ strong hydrogen bond(s). The role played by the water
molecule is best characterized as _____.
A) two ; one H-bond donor, one H-bond acceptor
B) two ; two H-bond donor
C) two ; two H-bond acceptor
D) one; H-bond donor
E) one; H-bond acceptor
B) the hydrogen bond will typically form between a hydrogen atom and either a nitrogen,
sulfur, or oxygen atom - Answers✓✓In a hydrogen bond between a water molecule and another
biomolecule, _____.
A) a hydrogen ion on the water molecule forms an ionic bond with a hydride ion on the other
molecule
B) the hydrogen bond will typically form between a hydrogen atom and either a nitrogen,
sulfur, or oxygen atom
C) the partial charge on a hydrogen of the water interacts with the partial charge on a hydrogen
of the other molecule
, ©Themoon EXAM SOLUTIONS
16/11/2024 17:33PM
D) a hydrogen on the water molecule forms a covalent bond to an oxygen or nitrogen atom on
the other molecule
E) the hydrogen atom is located between an oxygen atom of the water and a carbon atom of the
other molecule
E) ionic interactions - Answers✓✓The strongest non-covalent interactions are _____.
A) van der Waals interactions
B) London dispersion forces
C) hydrogen bonds
D) dipole-dipole interactions
E) ionic interactions
C) methanol - Answers✓✓Due to the formation of hydrogen bonds, _____ is highly soluble in
water.
A) carbon dioxide
B) sodium chloride
C) methanol
D) octane
E) cholesterol
B) hydrogens interact with the chloride ion, oxygens interact with the sodium ion -
Answers✓✓Which of the following explains the interactions that occur between the atoms of
water molecules and the ions that form when sodium chloride dissolves in water?
A) hydrogens interact with the sodium ion, oxygens interact with the chloride ion
B) hydrogens interact with the chloride ion, oxygens interact with the sodium ion
C) hydrogens interact with the sodium ion and the chloride ion
D) oxygens interact with the sodium ion and the chloride ion
E) none of the above
18/11/2024 17:20PM
Biochemistry Testbank 1 Exam Questions
and Answers
lipids, nucelotides, monosaccharides, amino acids - Answers✓✓What are the four major classes
of molecules studied in biochemistry (in monomeric form)?
carbohydrates - Answers✓✓Polymers of sugars are __________.
proteins - Answers✓✓Amino acids are the building blocks of _________.
pH = pKa + log([A-]/[HA]) - Answers✓✓What is the Henderson-Hasselbalch equation?
tris acid (HCl), tris base - Answers✓✓[HA] is the _____________ and [A-] is the
____________.
B) carbon - Answers✓✓Which of the following is the most abundant element in the human
body?
A) nitrogen
B) carbon
C) oxygen
D) phosphorous
E) none of the above
, ©Themoon EXAM SOLUTIONS
16/11/2024 17:33PM
D) lipids - Answers✓✓Which of the major types of biomolecules is never found in a polymeric
form?
A) amino acids
B) carbohydrates
C) nucleotides
D) lipids
E) none of the above
B) polysaccharide: glycosidic bond - Answers✓✓Which of the following biopolymers is
correctly paired with the bond that forms between the monomers?
A) protein: ester bond
B) polysaccharide: glycosidic bond
C) DNA: phosphate bond
D) RNA: phosphate bondE)all of the above
D) polysaccharide: energy storage - Answers✓✓Which of the biopolymers is correctly paired
with its major function?
A) protein: information encoding
B) nucleic acids: energy storage
C) lipids: information encoding
D) polysaccharide: energy storage
E) none of the above
A) nucleic acids - Answers✓✓The similarity of one organism to another (for example a bacteria
versus a human) is most easily done by comparing which biopolymer?
A) nucleic acids
B) polysaccharides
C) proteins
, ©Themoon EXAM SOLUTIONS
18/11/2024 17:20PM
D) lipids
E) all of the above
D) positive; negative - Answers✓✓In a water molecule, hydrogens are partially _____; oxygens
are partially _____.
A) negative; negative
B) negative; positive
C) positive; positive
D) positive; negative
E) none of the above
A) two ; one H-bond donor, one H-bond acceptor - Answers✓✓At any given moment, a single
water molecule participates in _____ strong hydrogen bond(s). The role played by the water
molecule is best characterized as _____.
A) two ; one H-bond donor, one H-bond acceptor
B) two ; two H-bond donor
C) two ; two H-bond acceptor
D) one; H-bond donor
E) one; H-bond acceptor
B) the hydrogen bond will typically form between a hydrogen atom and either a nitrogen,
sulfur, or oxygen atom - Answers✓✓In a hydrogen bond between a water molecule and another
biomolecule, _____.
A) a hydrogen ion on the water molecule forms an ionic bond with a hydride ion on the other
molecule
B) the hydrogen bond will typically form between a hydrogen atom and either a nitrogen,
sulfur, or oxygen atom
C) the partial charge on a hydrogen of the water interacts with the partial charge on a hydrogen
of the other molecule
, ©Themoon EXAM SOLUTIONS
16/11/2024 17:33PM
D) a hydrogen on the water molecule forms a covalent bond to an oxygen or nitrogen atom on
the other molecule
E) the hydrogen atom is located between an oxygen atom of the water and a carbon atom of the
other molecule
E) ionic interactions - Answers✓✓The strongest non-covalent interactions are _____.
A) van der Waals interactions
B) London dispersion forces
C) hydrogen bonds
D) dipole-dipole interactions
E) ionic interactions
C) methanol - Answers✓✓Due to the formation of hydrogen bonds, _____ is highly soluble in
water.
A) carbon dioxide
B) sodium chloride
C) methanol
D) octane
E) cholesterol
B) hydrogens interact with the chloride ion, oxygens interact with the sodium ion -
Answers✓✓Which of the following explains the interactions that occur between the atoms of
water molecules and the ions that form when sodium chloride dissolves in water?
A) hydrogens interact with the sodium ion, oxygens interact with the chloride ion
B) hydrogens interact with the chloride ion, oxygens interact with the sodium ion
C) hydrogens interact with the sodium ion and the chloride ion
D) oxygens interact with the sodium ion and the chloride ion
E) none of the above
