Podcast
Questions and Answers
What type of bonding stabilizes the α-helix?
What type of bonding stabilizes the α-helix?
- electrostatic bonding
- ionic bonding
- hydrogen bonding (correct)
- covalent bonding
What is the primary structure of keratins?
What is the primary structure of keratins?
- β-bend
- α-helical (correct)
- β-pleated sheet
- random coil
Why does proline disrupt an α-helix?
Why does proline disrupt an α-helix?
- It forms ionic bonds with other amino acids
- Its secondary amino group is geometrically compatible with the right-handed spiral of the α-helix
- It has a bulky side chain
- Its secondary amino group is not geometrically compatible with the right-handed spiral of the α-helix (correct)
What type of amino acids can interfere with the formation of an α-helix?
What type of amino acids can interfere with the formation of an α-helix?
What is a characteristic of β-sheets?
What is a characteristic of β-sheets?
What is the arrangement of β-strands in an antiparallel β-sheet?
What is the arrangement of β-strands in an antiparallel β-sheet?
What is the function of β-bends?
What is the function of β-bends?
What is the secondary structure that myoglobin has?
What is the secondary structure that myoglobin has?
What is the correct order of reading an amino acid sequence?
What is the correct order of reading an amino acid sequence?
What type of interactions occur between negatively charged groups and positively charged groups?
What type of interactions occur between negatively charged groups and positively charged groups?
What is the term used to describe proteins that consist of multiple polypeptide chains?
What is the term used to describe proteins that consist of multiple polypeptide chains?
What is the level of protein structure that describes the sequence of amino acids?
What is the level of protein structure that describes the sequence of amino acids?
What is the characteristic of fibrous 3D structure?
What is the characteristic of fibrous 3D structure?
What is the type of bond that keeps the entire peptide in a rigid planar configuration?
What is the type of bond that keeps the entire peptide in a rigid planar configuration?
What is the term for the arrangement of polypeptide subunits in a protein?
What is the term for the arrangement of polypeptide subunits in a protein?
What is an example of a protein with a dimeric quaternary structure?
What is an example of a protein with a dimeric quaternary structure?
What is the term used to describe the local conformation of a part of a polypeptide?
What is the term used to describe the local conformation of a part of a polypeptide?
What is the result of mild denaturation of a protein?
What is the result of mild denaturation of a protein?
What is the most common type of secondary structure in proteins?
What is the most common type of secondary structure in proteins?
What is the shape of the α-helix?
What is the shape of the α-helix?
What is an example of a physical agent of denaturation?
What is an example of a physical agent of denaturation?
What is the result of abnormalities in the amino acid sequences of proteins?
What is the result of abnormalities in the amino acid sequences of proteins?
What is a characteristic of denatured proteins?
What is a characteristic of denatured proteins?
What is the result of harsh denaturation conditions on a protein?
What is the result of harsh denaturation conditions on a protein?
What is the composition of amyloid proteins?
What is the composition of amyloid proteins?
What is the result of protein accumulation in tissues and organs?
What is the result of protein accumulation in tissues and organs?
In which of the following conditions can amyloid deposit be produced?
In which of the following conditions can amyloid deposit be produced?
What is the purpose of protein turnover?
What is the purpose of protein turnover?
How much protein is hydrolyzed and resynthesized daily?
How much protein is hydrolyzed and resynthesized daily?
What determines the rate of protein degradation?
What determines the rate of protein degradation?
Which peptide is 200 times sweeter than sucrose and used as a low-calorie artificial sweetener?
Which peptide is 200 times sweeter than sucrose and used as a low-calorie artificial sweetener?
What is the significant function of Glutathione in proteins?
What is the significant function of Glutathione in proteins?
Which hormone is produced by the posterior pituitary gland and stimulates the kidney to retain water?
Which hormone is produced by the posterior pituitary gland and stimulates the kidney to retain water?
What role do molecular chaperones play in protein folding?
What role do molecular chaperones play in protein folding?
What structure is predominantly found in proteins in persons with amyloidosis?
What structure is predominantly found in proteins in persons with amyloidosis?
What does the process of protein folding seek to achieve?
What does the process of protein folding seek to achieve?
Which peptide causes contraction of the uterus?
Which peptide causes contraction of the uterus?
What is the common result of protein misfolding?
What is the common result of protein misfolding?
