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Questions and Answers
Which amino acid disrupts the α-helix due to its secondary amino group not being geometrically compatible with the spiral of the helix?
Which amino acid disrupts the α-helix due to its secondary amino group not being geometrically compatible with the spiral of the helix?
- Tryptophan
- Proline (correct)
- Valine
- Isoleucine
What type of interactions do charged amino acids form in the context of disrupting the α-helix?
What type of interactions do charged amino acids form in the context of disrupting the α-helix?
- Covalent bonds
- Ionic interactions (correct)
- Hydrogen bonds
- Peptide bonds
Which secondary structure of proteins involves two or more polypeptide chains in an almost fully extended form?
Which secondary structure of proteins involves two or more polypeptide chains in an almost fully extended form?
- α-helix
- Turn
- β-sheet (correct)
- Coil
What type of β-sheet arrangement has polypeptide chains arranged with N- and C-termini alternating?
What type of β-sheet arrangement has polypeptide chains arranged with N- and C-termini alternating?
What type of bonds form between the polypeptide backbones of separate polypeptide chains in the context of β-sheet formation?
What type of bonds form between the polypeptide backbones of separate polypeptide chains in the context of β-sheet formation?
Which amino acid with bulky side chains interferes with the helical structure if present in large numbers?
Which amino acid with bulky side chains interferes with the helical structure if present in large numbers?
What is the primary structure of proteins defined as?
What is the primary structure of proteins defined as?
What is the name for the amide link between the α carboxyl group of one amino acid and the α-amino group of another?
What is the name for the amide link between the α carboxyl group of one amino acid and the α-amino group of another?
What is the N-terminal of a peptide chain?
What is the N-terminal of a peptide chain?
What characteristic gives the peptide bond a partial double bond character?
What characteristic gives the peptide bond a partial double bond character?
What type of structure is formed when a polypeptide chain forms a spiral structure with amino acid side chains extending outward?
What type of structure is formed when a polypeptide chain forms a spiral structure with amino acid side chains extending outward?
What stabilizes the α-helix structure through hydrogen bonding?
What stabilizes the α-helix structure through hydrogen bonding?
How many residues are linked through hydrogen bonds in each turn of the α-helix?
How many residues are linked through hydrogen bonds in each turn of the α-helix?
What does quaternary structure of proteins refer to?
What does quaternary structure of proteins refer to?
Which end of the peptide chain is written to the left, and which is written to the right?
Which end of the peptide chain is written to the left, and which is written to the right?
What are the only charged groups on a polypeptide?
What are the only charged groups on a polypeptide?
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