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Questions and Answers
What is the consequence of the glutamic acid being replaced by valine in sickle-cell anemia?
What is the consequence of the glutamic acid being replaced by valine in sickle-cell anemia?
- Impaired oxygen binding to red blood cells (correct)
- Increased circulation in small blood vessels
- Enhanced oxygen binding to red blood cells
- Prevention of organ damage
What type of bond stabilizes the α-helix structure in proteins?
What type of bond stabilizes the α-helix structure in proteins?
- Ionic bonds
- Covalent bonds
- Van der Waals forces
- Hydrogen bonds (correct)
How are the hydrogen bonds arranged in the β-pleated sheet structure?
How are the hydrogen bonds arranged in the β-pleated sheet structure?
- Distributed randomly along the peptide backbone
- Only within a single polypeptide chain
- Between all amino acid residues
- Formed between different peptide chains (correct)
What is the role of the amide proton and carbonyl oxygen in forming secondary structures?
What is the role of the amide proton and carbonyl oxygen in forming secondary structures?
In the α-helix structure, where does the partial negative charge occur?
In the α-helix structure, where does the partial negative charge occur?
How do antiparallel β-pleated sheets differ from parallel sheets in terms of hydrophobic side chains distribution?
How do antiparallel β-pleated sheets differ from parallel sheets in terms of hydrophobic side chains distribution?
What is the primary structure of a protein defined by?
What is the primary structure of a protein defined by?
Which terminus of a polypeptide chain contains the free carboxyl group?
Which terminus of a polypeptide chain contains the free carboxyl group?
What defines the one-dimensional first step in specifying the three-dimensional structure of a protein?
What defines the one-dimensional first step in specifying the three-dimensional structure of a protein?
Which level of protein structure involves the arrangement of multiple polypeptide chains to form a functional protein complex?
Which level of protein structure involves the arrangement of multiple polypeptide chains to form a functional protein complex?
What provides insight into the functional diversity of protein molecules in biological systems?
What provides insight into the functional diversity of protein molecules in biological systems?
Where is the amino sequence read from in a polypeptide chain?
Where is the amino sequence read from in a polypeptide chain?
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