Biochemistry Module
In this worksheet, we will practice describing the synthesis, structures, and functions of proteins.
Q1:
Which of the following best explains the role of hydrogen bonds in protein structure?
⦁ AHydrogen bonds form within amino acids to join the carboxyl group to the amino group.
⦁ BHydrogen bonds form between amino acids to hold the protein in its secondary-structure shape (e.g., alpha-helix).
⦁ CHydrogen bonds form between amino acids to hold them in a polypeptide chain.
⦁ DHydrogen bonds form between amino acids and water molecules to contribute to the quaternary structure of the protein.
Q2:
Proteins are complex macromolecules formed from polypeptide chains. What monomers join to form polypeptides?
⦁ AGlycerol
⦁ BLipids
⦁ CFatty acids
⦁ DSimple sugars
⦁ EAmino acids
Q3:
Which of the following best describes the primary structure of a protein?
⦁ AThe primary structure of a protein refers to the sequence of amino acids in its polypeptide chain.
⦁ BThe primary structure of a protein is the complex 3D structure formed when multiple polypeptides interact and combine.
⦁ CThe primary structure of a protein is the 3D structure that forms due to interactions between the R groups of amino acids.
⦁ DThe primary structure of a protein is the folded structure (alpha-helix or beta-sheet) formed by additional bonds formed in the polypeptide chain.
Q4:
Which of the following best describes the quaternary structure of a protein?
⦁ AThe quaternary structure of a protein is the 3D structure that forms due to interactions between the R groups of amino acids.
⦁ BThe quaternary structure of a protein is the folded structure (alpha-helix or beta-sheet) formed by additional bonds formed in the polypeptide chain.
⦁ CThe quaternary structure of a protein is the complex 3D structure formed when multiple polypeptides interact and combine.
⦁ DThe quaternary structure of a protein refers to the sequence of amino acids in its polypeptide chain.
Q5:
Which of the following best describes the secondary structure of a protein?
⦁ AThe secondary structure of a protein refers to the sequence of amino acids in its polypeptide chain.
⦁ BThe secondary structure of a protein is the folded structure (alpha-helix or beta-sheet) formed by additional bonds that are formed in the polypeptide chain.
⦁ CThe secondary structure of a protein is the 3D structure that forms due to interactions between the R groups of amino acids.
⦁ DThe secondary structure of a protein is the complex 3D structure formed when multiple polypeptides interact and combine.
Q6:
Which of the following best explains the structure of a polypeptide?
⦁ AA polypeptide is a protein formed by the joining of three amino acids to a glycerol molecule.
⦁ BA polypeptide is a chain of amino acids joined together by carboxyl bonds between the amino groups of each amino acid.
⦁ CA polypeptide is a chain of amino acids joined together by peptide bonds between the carboxyl group of one and the amino group of another.
⦁ DA polypeptide is a chain of proteins joined by peptide bonds between the hydrogens of each protein.
Q7:
Which of the following best describes the tertiary structure of a protein?
⦁ AThe tertiary structure of a protein is the folded structure (alpha-helix or beta-sheet) formed by additional bonds that are formed in the polypeptide chain.
⦁ BThe tertiary structure of a protein is the complex 3D structure formed when multiple polypeptides interact and combine.
⦁ CThe tertiary structure of a protein refers to the sequence of amino acids in its polypeptide chain.
⦁ DThe tertiary structure of a protein is the 3D structure that forms due to interactions between the R groups of amino acids.
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