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Proteins quiz #3

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  • What types of monomers form proteins?
    Amino acid monomers form proteins.
  • What is the monomer unit of a protein?
    The monomer unit of a protein is an amino acid.
  • What types of interactions help determine a protein's tertiary structure?
    Hydrogen bonds, Ionic bonds, Disulfide bridges
  • How many different amino acids are used to build proteins?
    20 different amino acids are used to build proteins.
  • Which proteins do not have a nuclear localization signal?
    Cytoplasmic proteins
  • How many amino acids are used to build our proteins?
    20 amino acids are used to build our proteins.
  • What level of protein structure is the amino acid sequence of the protein?
    The primary structure is the level of protein structure that refers to the amino acid sequence.
  • Which statement about proteins is false?
    They store genetic information
  • Polymers of amino acids form a polypeptide. What is the shape of a polypeptide?
    The shape of a polypeptide is determined by its tertiary structure, which is a three-dimensional shape.
  • Why are animal protein sources considered to be complete proteins?
    Animal protein sources are considered complete because they contain all essential amino acids.
  • What are the monomer units that make up proteins?
    Amino acids are the monomer units that make up proteins.
  • What is a function of proteins in cells?
    Catalysis
  • What is the name of the monomer that makes up proteins?
    The monomer that makes up proteins is called an amino acid.
  • Which two of the following are types of secondary structures of proteins? a) Alpha helices b) Beta sheets c) Tertiary folds d) Quaternary complexes
    a) Alpha helices b) Beta sheets
  • What kinds of interactions are not part of tertiary protein structure? a) Hydrogen bonds b) Ionic bonds c) Peptide bonds d) Disulfide bridges
    c) Peptide bonds
  • In proteins that only have a single polypeptide chain, which levels of structure are present?
    Primary, secondary, and tertiary structures are present in proteins with a single polypeptide chain.
  • What are the building blocks of proteins?
    Amino acids are the building blocks of proteins.
  • What type of bond joins amino acids into proteins?
    Peptide bonds join amino acids into proteins.
  • What is the function of the proteasome?
    The proteasome degrades unneeded or damaged proteins by proteolysis.
  • Which best describes why protein functions are diverse?
    Protein functions are diverse due to the variety of amino acid sequences and structures.
  • What are proteins made of?
    They are made of amino acids
  • What are examples of secondary structures in proteins?
    Alpha helices and Beta sheets
  • Which biomolecule is composed of amino acids?
    Proteins are composed of amino acids.
  • Are animal proteins complete or incomplete sources of protein?
    Animal proteins are complete
  • What is a true statement about proteins regarding their function?
    They can function as enzymes
  • What is not a true characteristic of proteins?
    They store genetic information
  • What protein is matched with its function? a) Hemoglobin - oxygen transport b) Insulin - genetic information storage c) Collagen - enzyme catalysis d) Myosin - energy storage
    a) Hemoglobin - oxygen transport
  • What is the function of protein kinases?
    Protein kinases function to phosphorylate other proteins, altering their activity.
  • Which structure type is not considered a protein secondary structure?
    Tertiary folds are a type of secondary structure
  • Building blocks of proteins?
    Amino acids are the building blocks of proteins.
  • How does the structure of a protein affect its function?
    The structure of a protein determines its function by dictating how it interacts with other molecules.
  • How does the shape of a protein relate to its function?
    The shape of a protein is crucial for its function, as it determines the protein's ability to interact with other molecules.
  • What makes one amino acid different from another?
    The R group, or side chain, makes one amino acid different from another.
  • Which structural level of a protein would be least affected by a disruption in hydrogen bonding?
    The primary structure would be least affected by a disruption in hydrogen bonding.
  • What levels of structure do all proteins have?
    All proteins have primary, secondary, and tertiary structures.
  • How does the primary structure of a protein affect the other structural levels?
    The primary structure determines the folding and interactions that lead to secondary, tertiary, and quaternary structures.
  • Which is not a function of proteins? a) Energy storage b) Catalysis c) Transport d) Structural support
    a) Energy storage
  • What determines the tertiary structure of proteins?
    The tertiary structure is determined by interactions between the R groups of amino acids.
  • Amino acids are the monomer (building blocks) of which biomolecule?
    Amino acids are the monomers of proteins.
  • How does primary protein structure affect the function of protein enzymes?
    The primary structure determines the enzyme's active site shape, affecting its ability to catalyze reactions.