Biochemistry Test Bank 1 All Chapters Fall 2020 Q&As Updated Verified Solution
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 - CORRECT ANSWER - B) carbon
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 - CORRECT ANSWER - D) lipids
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 - CORRECT ANSWER - B) polysaccharide:
glycosidic bond
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 - CORRECT ANSWER - D) polysaccharide: energy storage
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
D) lipids
E) all of the above - CORRECT ANSWER - A) nucleic acids
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 - CORRECT ANSWER - D) positive; negative
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 - CORRECT ANSWER - A) two ; one H-bond donor, one H-
bond acceptor
,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
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 - CORRECT ANSWER - B) the hydrogen bond will typically
form between a hydrogen atom and either a nitrogen, sulfur, or oxygen atom
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 - CORRECT ANSWER - E) ionic interactions
Due to the formation of hydrogen bonds, _____ is highly soluble in water.
A) carbon dioxide
B) sodium chloride
C) methanol
D) octane
E) cholesterol - CORRECT ANSWER - C) methanol
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 - CORRECT ANSWER - B) hydrogens interact with the chloride
ion, oxygens interact with the sodium ion
When a non-polar substance is added to water, how do the molecules of water behave?
A) the regular hydrogen bond pattern is disrupted resulting in a decrease of entropy
B) the regular hydrogen bond pattern is disrupted resulting in an increase of entropy
C) the regular hydrogen bond pattern is disrupted resulting in a decrease of enthalpy
D) the regular hydrogen bond pattern is disrupted resulting in an increase of enthalpy
E) none of the above - CORRECT ANSWER - A) the regular hydrogen bond pattern is
disrupted resulting in a decrease of entropy
Which of the following is an example of the hydrophobic effect?
A) the lipid membrane of cells and organelles
B) protein folding that places hydrophobic amino acids in the interior of the protein
C) the separation of salad dressing
D) oil sheens seen on the ocean following an oil spill
E) all of the above - CORRECT ANSWER - E) all of the above
Which of the following explains the attractive forces between hydrophobic molecules in
an aqueous solution?
A) in an aqueous environment, London dispersion forces between hydrophobic
molecules become stronger
B) in an aqueous environment, London dispersion forces between hydrophobic
molecules and water become stronger
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 - CORRECT ANSWER - B) carbon
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 - CORRECT ANSWER - D) lipids
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 - CORRECT ANSWER - B) polysaccharide:
glycosidic bond
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 - CORRECT ANSWER - D) polysaccharide: energy storage
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
D) lipids
E) all of the above - CORRECT ANSWER - A) nucleic acids
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 - CORRECT ANSWER - D) positive; negative
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 - CORRECT ANSWER - A) two ; one H-bond donor, one H-
bond acceptor
,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
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 - CORRECT ANSWER - B) the hydrogen bond will typically
form between a hydrogen atom and either a nitrogen, sulfur, or oxygen atom
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 - CORRECT ANSWER - E) ionic interactions
Due to the formation of hydrogen bonds, _____ is highly soluble in water.
A) carbon dioxide
B) sodium chloride
C) methanol
D) octane
E) cholesterol - CORRECT ANSWER - C) methanol
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 - CORRECT ANSWER - B) hydrogens interact with the chloride
ion, oxygens interact with the sodium ion
When a non-polar substance is added to water, how do the molecules of water behave?
A) the regular hydrogen bond pattern is disrupted resulting in a decrease of entropy
B) the regular hydrogen bond pattern is disrupted resulting in an increase of entropy
C) the regular hydrogen bond pattern is disrupted resulting in a decrease of enthalpy
D) the regular hydrogen bond pattern is disrupted resulting in an increase of enthalpy
E) none of the above - CORRECT ANSWER - A) the regular hydrogen bond pattern is
disrupted resulting in a decrease of entropy
Which of the following is an example of the hydrophobic effect?
A) the lipid membrane of cells and organelles
B) protein folding that places hydrophobic amino acids in the interior of the protein
C) the separation of salad dressing
D) oil sheens seen on the ocean following an oil spill
E) all of the above - CORRECT ANSWER - E) all of the above
Which of the following explains the attractive forces between hydrophobic molecules in
an aqueous solution?
A) in an aqueous environment, London dispersion forces between hydrophobic
molecules become stronger
B) in an aqueous environment, London dispersion forces between hydrophobic
molecules and water become stronger
