Which of the following can form a covalent bond between the two sequences under non-reducing conditions?
Sequences C and D
Sequences A and H
Sequences B and E
Sequences A and C
Sequences F and G
Which of the following sequences can form an alpha-helix with hydrophobic residues only along one face of the helix, and hydrophilic residues only along the other face of the helix?
Sequence F
Sequence G
Sequence H
Sequence E
Sequence B
Which of the following sequences, if present in several copies in the protein, might form beta-strands that form a beta-sheet with hydrophobic and hydrophilic groups on opposite sides of the sheet (e.g., all hydrophobic residues above the sheet and all hydrophilic residues below the sheet)?
Sequence C
Sequence E
Sequence F
Sequence H
Sequence A
Which of the following sequences would least likely form a single alpha-helix along its entire length?
Sequence F
Sequence E
Sequence D
Sequence G
Sequence B
Which of the following sequences would absorb the strongest at 280 nm?
Sequence F
Sequence E
Sequence A
Sequence G
Sequence C
Homework Answers
Q1) c
Q2) d
Q3) a
Q4) e
Q5) d
If you have any doubt or need explanation, please mention in comment.
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Which of the following can form a covalent bond between
the two sequences under non-reducing conditions?...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys,...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys, or His residues? A) Collagen B) Alpha keratin C) Hemoglobin D) Myoglobin E) Beta barrels 6. Which of the following correlates to the classic experiment demonstrating that reduced and denatured RNase A could refold into the native form? A) Disulfide bonds do not stabilize folded proteins B) Reducing agents denature proteins C) 1° structure can determine 3° structure D) Urea cleaves disulfide bonds E)...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an al...
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25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an al...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an alpha-helical structure? Why? 26. A beta strand is a stretch of residues in the extended conformation that can participate in a beta sheet. (In the figure at right, beta strands A and B participate in a two-strand sheet.) What sorts of hydrogen bonds are required for the formation of single beta strands and for the formation of beta sheets? backbone- backbone sidechain...
Which of the following is true of secondary structure in protein folding? Pick ALL that apply....
Which of the following is true of secondary structure in protein folding? Pick ALL that apply. A. It involves hydrogen bonding. B. It involves the side chains. C. It involves hydrophobic interactions. D. It results in alpha helicies with the side chains hidden inside the helix. E. It results in beta-pleated sheets with side chains sticking out of the plain of the sheet. F. It involves the peptide backbone.
Based on the chemical properties of the residues, which of the following sequences could form the...
Based on the chemical properties of the residues, which of the
following sequences could form the following? At least one should
be placed in each category.
Based on the chemical properties of the residues, which of the following sequences could form the following? At least one should be placed in each category Most likely an amphipathic Most likely an amphipathic B sheet a helix Most likely a turn/ loop Not amphipathic Asn-Leu-Ala-Asp-Ser-Phe-Arg-Gin-lle Lys-Ser-Thr-Asn-Glu-Gin-Asn-Ser-Arg Gin-lle-Thr-Phe-Thr-Leu-GIn-Val-Ser Lys-GIn-Asn-Glu-Pro-Arg-Ala-Asn-Glu Arg-Phe-GIn-lle-His-Val-Gin-Phe-Glu Ala-Phe-Leu-Val-lle-Trp-Phe-Val-Ala
Question 11. Certain amino acids destabilize or prevent formation of alpha-helices. Which amino acid is more...
Question 11. Certain amino acids destabilize or prevent formation of alpha-helices. Which amino acid is more likely to be found in these structures based on its charge and R-group size? A. Glycine B. Proline C. A sequence of several Glutamate D. A sequence of several Lysine E. Alanine Question 12. Which of the following is least likely to result in protein denaturation? A) Altering net charge by changing pH B) Changing the salt concentration C) Disruption of weak interactions by...
Question 10 (4 points) Although all protein structures are unique, there are common structural building blocks...
Question 10 (4 points) Although all protein structures are unique, there are common structural building blocks that are referred to as regular secondary structures, Some proteins have alpha-helices, some have beta-sheets, and still others have a combination of both. What makes it possible for proteins to have these common structural elements? 12 15 a) the hydrophobic-core interactions. b) hydrogen bonds that form along (alpha helices) or between (beta sheets) polypeptide backbones. c) side-chain interactions d) specific amino acid sequences. 7...
Question 4: Which of the following sequences will most likely form an α-helix. a) GGGAGGGAGGGAGGGA b)...
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5) Draw a ribose sugar and glucose sugar ring structure form. 6) To which group or...
5) Draw a ribose sugar and glucose sugar ring structure form. 6) To which group or groups of amino acids does the molecule below belong? Choose the one best answer. Make sure you consider all choices. a. Hydrophilic acidic b. Hydrophilic neutral c. Hydrophilic basic d. Hydrophobic neutral e. a and b tbandc & cand d h. danda Hin-çu-&-0 CH₂ oo- 7) Indicate with arrows the two atoms that would be involved in peptide bonds if the amino acid were...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys, or His residues? A) Collagen B) Alpha keratin C) Hemoglobin D) Myoglobin E) Beta barrels 6. Which of the following correlates to the classic experiment demonstrating that reduced and denatured RNase A could refold into the native form? A) Disulfide bonds do not stabilize folded proteins B) Reducing agents denature proteins C) 1° structure can determine 3° structure D) Urea cleaves disulfide bonds E)...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an alpha-helical structure? Why? 26. A beta strand is a stretch of residues in the extended conformation that can participate in a beta sheet. (In the figure at right, beta strands A and B participate in a two-strand sheet.) What sorts of hydrogen bonds are required for the formation of single beta strands and for the formation of beta sheets? backbone- backbone sidechain...
25. Consider two peptide sequences: LKAENDEAARAMSEA and CRAGGFPWDQPGTSN. Which of the two is more likely to adopt an alpha-helical structure? Why? 26. A beta strand is a stretch of residues in the extended conformation that can participate in a beta sheet. (In the figure at right, beta strands A and B participate in a two-strand sheet.) What sorts of hydrogen bonds are required for the formation of single beta strands and for the formation of beta sheets? backbone- backbone sidechain...
Based on the chemical properties of the residues, which of the
following sequences could form the following? At least one should
be placed in each category.
Based on the chemical properties of the residues, which of the following sequences could form the following? At least one should be placed in each category Most likely an amphipathic Most likely an amphipathic B sheet a helix Most likely a turn/ loop Not amphipathic Asn-Leu-Ala-Asp-Ser-Phe-Arg-Gin-lle Lys-Ser-Thr-Asn-Glu-Gin-Asn-Ser-Arg Gin-lle-Thr-Phe-Thr-Leu-GIn-Val-Ser Lys-GIn-Asn-Glu-Pro-Arg-Ala-Asn-Glu Arg-Phe-GIn-lle-His-Val-Gin-Phe-Glu Ala-Phe-Leu-Val-lle-Trp-Phe-Val-Ala
Question 11. Certain amino acids destabilize or prevent formation of alpha-helices. Which amino acid is more likely to be found in these structures based on its charge and R-group size? A. Glycine B. Proline C. A sequence of several Glutamate D. A sequence of several Lysine E. Alanine Question 12. Which of the following is least likely to result in protein denaturation? A) Altering net charge by changing pH B) Changing the salt concentration C) Disruption of weak interactions by...
Question 10 (4 points) Although all protein structures are unique, there are common structural building blocks that are referred to as regular secondary structures, Some proteins have alpha-helices, some have beta-sheets, and still others have a combination of both. What makes it possible for proteins to have these common structural elements? 12 15 a) the hydrophobic-core interactions. b) hydrogen bonds that form along (alpha helices) or between (beta sheets) polypeptide backbones. c) side-chain interactions d) specific amino acid sequences. 7...
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