Portage Biochemistry- Module 3 Exam
Questions & Answers (Grade A+)
Name three different functions of proteins. -
correct answer ✅Transport, hormones, catalysis, structure, and
protection
What function does a protease have? -
correct answer ✅catalysis. It degrades proteins.
What is the function of hormones? -
correct answer ✅These proteins communicate from one cell to
another
What are the functional groups common to all amino acids? -
correct answer ✅amine and carboxylic acid
Briefly describe the five major groupings of amino acids. -
correct answer ✅The amino acids are grouped into 1) nonpolar,
aliphatic 2) nonpolar and aromatic 3) polar but neutral, 4) acidic,
and 5) basic.
What is the name, one-letter abbreviation, and three-letter
abbreviation of the following amino acid? -
correct answer ✅Arginine, R, Arg (study cards)
,Portage Biochemistry- Module 3 Exam
Questions & Answers (Grade A+)
What amino acid can form a disulfide bond? -
correct answer ✅cysteine
Which amino acid is the only one to have its side chain connected
to the amine group? -
correct answer ✅proline
Consider the following protein structure. Fill the blanks with the
appropriate term below.
The major type of secondary structure present in this protein is
____A_______.
The protein's overall tertiary structure is a _______B______
conformation. (select one: globular or fibrous).
This protein has two polypeptide chains, which indicates it has
______C______ structure. -
correct answer ✅(A) alpha helices
(B) globular
(C) quaternary
Consider the following pentapeptide: ETYLVD.
, Portage Biochemistry- Module 3 Exam
Questions & Answers (Grade A+)
Which amino acid is at the N terminal? Which is at the C terminal? -
correct answer ✅E is at the N-terminal, and D is at the C-terminal.
Consider the following tetrapeptide. A) Use the three-letter
abbreviations to write the representation of the following
tetrapeptide. B) How many peptide bonds are in this peptide? (see
card) -
correct answer ✅A) Lys-Asp-Ile-Thr
B) 3 peptide bonds connect four amino acids.
Differentiate between protein tertiary structure and protein
quaternary structure. -
correct answer ✅Tertiary structure is the conformation or shape of
a single polypeptide chain. Quaternary structure is the orientation
of multiple subunits.
Proteins typically adopt either a conformation that is fibrous or
___________. -
correct answer ✅globular
What is the function of an enzyme? -
correct answer ✅to accelerate the rate of a biological reaction
Questions & Answers (Grade A+)
Name three different functions of proteins. -
correct answer ✅Transport, hormones, catalysis, structure, and
protection
What function does a protease have? -
correct answer ✅catalysis. It degrades proteins.
What is the function of hormones? -
correct answer ✅These proteins communicate from one cell to
another
What are the functional groups common to all amino acids? -
correct answer ✅amine and carboxylic acid
Briefly describe the five major groupings of amino acids. -
correct answer ✅The amino acids are grouped into 1) nonpolar,
aliphatic 2) nonpolar and aromatic 3) polar but neutral, 4) acidic,
and 5) basic.
What is the name, one-letter abbreviation, and three-letter
abbreviation of the following amino acid? -
correct answer ✅Arginine, R, Arg (study cards)
,Portage Biochemistry- Module 3 Exam
Questions & Answers (Grade A+)
What amino acid can form a disulfide bond? -
correct answer ✅cysteine
Which amino acid is the only one to have its side chain connected
to the amine group? -
correct answer ✅proline
Consider the following protein structure. Fill the blanks with the
appropriate term below.
The major type of secondary structure present in this protein is
____A_______.
The protein's overall tertiary structure is a _______B______
conformation. (select one: globular or fibrous).
This protein has two polypeptide chains, which indicates it has
______C______ structure. -
correct answer ✅(A) alpha helices
(B) globular
(C) quaternary
Consider the following pentapeptide: ETYLVD.
, Portage Biochemistry- Module 3 Exam
Questions & Answers (Grade A+)
Which amino acid is at the N terminal? Which is at the C terminal? -
correct answer ✅E is at the N-terminal, and D is at the C-terminal.
Consider the following tetrapeptide. A) Use the three-letter
abbreviations to write the representation of the following
tetrapeptide. B) How many peptide bonds are in this peptide? (see
card) -
correct answer ✅A) Lys-Asp-Ile-Thr
B) 3 peptide bonds connect four amino acids.
Differentiate between protein tertiary structure and protein
quaternary structure. -
correct answer ✅Tertiary structure is the conformation or shape of
a single polypeptide chain. Quaternary structure is the orientation
of multiple subunits.
Proteins typically adopt either a conformation that is fibrous or
___________. -
correct answer ✅globular
What is the function of an enzyme? -
correct answer ✅to accelerate the rate of a biological reaction
