BIOL 150 EXAM 2 KU QUESTIONS WITH
CORRECT ANSWERS 2026
True or false: The sequence of amino acids in a protein is referred to as its primary structure. -
CORRECT ANSWER -true
Which one of the following is specific to the synthesis of only one type of protein?
a transfer RNA
an aminoacyl tRNA synthetase
an elongation factor
a ribosome
a messenger RNA - CORRECT ANSWER -messenger RNA
Which of the following steps in translation comes earliest?
identification of initiator codon and joining of large and small ribosomal subunits
movement of the ribosome three bases closer to the 3' end of the mRNA
release of the polypeptide from the ribosome and dissociation of ribosomal subunits
peptide bond formation - CORRECT ANSWER -identification of initiator codon and joining of
large and small ribosomal subunits
True or False: amino acids with hydrophobic side chains are most often found buried in the
interior of folded proteins. - CORRECT ANSWER -true
The covalent bond between adjacent amino acids in a polypeptide chain is referred to as a
____________ bond. - CORRECT ANSWER -peptide
,The three-dimensional structure of a functional protein composed of a single polypeptide chain
is referred to as the ____________ structure.
tertiary
secondary
quaternary
primary - CORRECT ANSWER -tertiary
True or False: the individual polypeptide chains in a multi-subunit protein each have their own
primary, secondary, and tertiary structure. - CORRECT ANSWER -true
Secondary structure is characterized by which one of the following types of interactions?
A covalent bond between two cysteines
The bond between an amino nitrogen and a carboxyl carbon
Hydrogen bonding between side chains of amino acids
Hydrogen bonding within the peptide backbone
Ionic bonding between an acidic side chain and a basic side chain - CORRECT ANSWER -
Hydrogen bonding within the peptide backbone
Which one of the following can contribute to a protein's tertiary structure?
Ionic bonding
Hydrogen bonding
van der Waal's forces
Covalent bonding
, All of these choices are correct. - CORRECT ANSWER -all of these choices are correct
The unfolding of a protein by heat or chemical treatment is referred to as:
depolymerization.
disaggregation.
hydrolysis.
uncoupling.
denaturation. - CORRECT ANSWER -denaturation
Proteins that do not refold properly after being heated generally require the assistance of which
one of the following types of molecules in vivo?
Transferases
Ribosomes
Chaperones
Polymerases
Enhancers - CORRECT ANSWER -chaperones
The three-dimensional shape of a protein is determined by the primary, secondary, tertiary, and
in many cases, the quaternary structure of the protein. The following sentence is taken from
scientific articles on protein structure. Choose the level of protein structure that applies best to
the sentence.
"Hydrogen bonds between peptide backbone components form a distinct helical structure."
Secondary
CORRECT ANSWERS 2026
True or false: The sequence of amino acids in a protein is referred to as its primary structure. -
CORRECT ANSWER -true
Which one of the following is specific to the synthesis of only one type of protein?
a transfer RNA
an aminoacyl tRNA synthetase
an elongation factor
a ribosome
a messenger RNA - CORRECT ANSWER -messenger RNA
Which of the following steps in translation comes earliest?
identification of initiator codon and joining of large and small ribosomal subunits
movement of the ribosome three bases closer to the 3' end of the mRNA
release of the polypeptide from the ribosome and dissociation of ribosomal subunits
peptide bond formation - CORRECT ANSWER -identification of initiator codon and joining of
large and small ribosomal subunits
True or False: amino acids with hydrophobic side chains are most often found buried in the
interior of folded proteins. - CORRECT ANSWER -true
The covalent bond between adjacent amino acids in a polypeptide chain is referred to as a
____________ bond. - CORRECT ANSWER -peptide
,The three-dimensional structure of a functional protein composed of a single polypeptide chain
is referred to as the ____________ structure.
tertiary
secondary
quaternary
primary - CORRECT ANSWER -tertiary
True or False: the individual polypeptide chains in a multi-subunit protein each have their own
primary, secondary, and tertiary structure. - CORRECT ANSWER -true
Secondary structure is characterized by which one of the following types of interactions?
A covalent bond between two cysteines
The bond between an amino nitrogen and a carboxyl carbon
Hydrogen bonding between side chains of amino acids
Hydrogen bonding within the peptide backbone
Ionic bonding between an acidic side chain and a basic side chain - CORRECT ANSWER -
Hydrogen bonding within the peptide backbone
Which one of the following can contribute to a protein's tertiary structure?
Ionic bonding
Hydrogen bonding
van der Waal's forces
Covalent bonding
, All of these choices are correct. - CORRECT ANSWER -all of these choices are correct
The unfolding of a protein by heat or chemical treatment is referred to as:
depolymerization.
disaggregation.
hydrolysis.
uncoupling.
denaturation. - CORRECT ANSWER -denaturation
Proteins that do not refold properly after being heated generally require the assistance of which
one of the following types of molecules in vivo?
Transferases
Ribosomes
Chaperones
Polymerases
Enhancers - CORRECT ANSWER -chaperones
The three-dimensional shape of a protein is determined by the primary, secondary, tertiary, and
in many cases, the quaternary structure of the protein. The following sentence is taken from
scientific articles on protein structure. Choose the level of protein structure that applies best to
the sentence.
"Hydrogen bonds between peptide backbone components form a distinct helical structure."
Secondary
