PORTAGE LEARNING BIOCHEM MODULE 3
COMPREHENSIVE EXAMINATION TEST 2026
SOLVED QUESTIONS ANSWERS GRADED A+
◉ What function does a protease have?
Answer: catalysis. It degrades proteins.
◉ What is the function of hormones?
Answer: These proteins communicate from one cell to another
◉ What are the functional groups common to all amino acids?
Answer: amine and carboxylic acid
◉ Briefly describe the five major groupings of amino acids.
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?
Answer: Arginine, R, Arg (study cards)
◉ What amino acid can form a disulfide bond?
, Answer: cysteine
◉ Which amino acid is the only one to have its side chain connected
to the amine group?
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.
Answer: (A) alpha helices
(B) globular
(C) quaternary
◉ Consider the following pentapeptide: ETYLVD.
Which amino acid is at the N terminal? Which is at the C terminal?
Answer: E is at the N-terminal, and D is at the C-terminal.
COMPREHENSIVE EXAMINATION TEST 2026
SOLVED QUESTIONS ANSWERS GRADED A+
◉ What function does a protease have?
Answer: catalysis. It degrades proteins.
◉ What is the function of hormones?
Answer: These proteins communicate from one cell to another
◉ What are the functional groups common to all amino acids?
Answer: amine and carboxylic acid
◉ Briefly describe the five major groupings of amino acids.
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?
Answer: Arginine, R, Arg (study cards)
◉ What amino acid can form a disulfide bond?
, Answer: cysteine
◉ Which amino acid is the only one to have its side chain connected
to the amine group?
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.
Answer: (A) alpha helices
(B) globular
(C) quaternary
◉ Consider the following pentapeptide: ETYLVD.
Which amino acid is at the N terminal? Which is at the C terminal?
Answer: E is at the N-terminal, and D is at the C-terminal.
