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Questions and Answers
What determines the distinct properties of individual proteins?
What determines the distinct properties of individual proteins?
- The peptide bond
- The amino acid side chains (correct)
- The polypeptide structure
- The 3D structure
What is the stable spatial arrangement of polypeptide chain segments held together by hydrogen bonds between backbone groups called?
What is the stable spatial arrangement of polypeptide chain segments held together by hydrogen bonds between backbone groups called?
- Quaternary structure
- Primary structure
- Secondary structure (correct)
- Tertiary structure
How is the alpha helix stabilized?
How is the alpha helix stabilized?
- By hydrogen bonds between backbone oxygen and hydrogen atoms (correct)
- By disulfide bonds
- By ionic interactions between R groups
- By van der Waals interactions
Which complex contains 20 subunits?
Which complex contains 20 subunits?
What is the function of enzymes in cell reactions?
What is the function of enzymes in cell reactions?
Which enzyme catalyzes the breaking of peptide bonds?
Which enzyme catalyzes the breaking of peptide bonds?
How do enzymes regulate protein activity?
How do enzymes regulate protein activity?
What is the role of E3 Ub ligase in protein degradation?
What is the role of E3 Ub ligase in protein degradation?
What is the main function of phosphatases?
What is the main function of phosphatases?
Where does proteolysis occur within the proteasome?
Where does proteolysis occur within the proteasome?
What is the role of the Mediator complex?
What is the role of the Mediator complex?
What type of motif consists of 2 alpha helices wound around each other?
What type of motif consists of 2 alpha helices wound around each other?
What is the primary stabilizing force in the tertiary structure of proteins?
What is the primary stabilizing force in the tertiary structure of proteins?
Which amino acid is commonly found in beta turns due to its small R group?
Which amino acid is commonly found in beta turns due to its small R group?
Which secondary structure is stabilized by hydrogen bonds between backbone oxygen and hydrogen atoms in amino acids on different strands?
Which secondary structure is stabilized by hydrogen bonds between backbone oxygen and hydrogen atoms in amino acids on different strands?
What is the characteristic feature of the structure of a beta turn?
What is the characteristic feature of the structure of a beta turn?
What is the role of prolines in alpha helices?
What is the role of prolines in alpha helices?
Which representation emphasizes how beta strands and alpha helices are organized in a protein?
Which representation emphasizes how beta strands and alpha helices are organized in a protein?
What is the size range of supramolecular complexes in proteins?
What is the size range of supramolecular complexes in proteins?
What is the tertiary structure of unactivated Hemagglutinin (HA) characterized by?
What is the tertiary structure of unactivated Hemagglutinin (HA) characterized by?
What do EGF domains in proteins like Neu and Tissue plasminogen activator (TPA) contain?
What do EGF domains in proteins like Neu and Tissue plasminogen activator (TPA) contain?
What type of motif is present in many DNA-binding proteins that help regulate transcription?
What type of motif is present in many DNA-binding proteins that help regulate transcription?
What is the driving force for hydrophobic residues to cluster together in the folded protein core?
What is the driving force for hydrophobic residues to cluster together in the folded protein core?
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