D) meydue to amino acid side chain interactions C) They form because of interact
ID: 211094 • Letter: D
Question
D) meydue to amino acid side chain interactions C) They form because of interactions between amino acids far apart in peptide sequence D) They both have the same phi and psi angles around the alpha carbon E) They are formed from regular bond angles around alpha carbons 33 - In an alpha helix and beta sheet the amino acid side chains: A) B) C) D) E) are responsible for the bonds forming the structure. are exposed at regular intervals on the surface of the structure. are in the core of the structure. Form hydrogen bonds with neighboring peptide bonds. do not influence formation of the helix. 34-A turn: A) B) C) D) E) requires ionic bonds. can use proline residues in the cis configuration. is required for parallel beta sheets to form. is considered a domain. would not be denatured by elevated temperature. 35-A fibrous protein does not generally contain which level of protein structure? A) Primary B) secondary C) tertiary D) quaternary 36 - Which of the following pairs of amino acids could interact through hydrogen bonding to give rise to quaternary structure? A) Glycine and Arginine B) Alanine and Arginine C) Serine and Glutamine D) Glycine and glutamic acid E) Valine and Aspartic acidExplanation / Answer
Q.33 - Option B.
In alpha helix and beta sheets, the side chain of the amino acids are pointed outward, which mean they are exposed at regular interval on the surface of the structure.
Q.34 - Option B.
A beta turn uses both proline and glycine for it configuration. These are the two amino acid which are most commonly found in this configuration as these favour the beta turn.
Q.35 - Option C.
Fibrous protein usually has very less tertiary structure.
Q.36 - Option C.
Serine and glutamine consist of hydroxyl and amide group in its side chain which are paticipated in hydrogen bonding.
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