Which amino acid is cannot be found in an alpha helix? Explain.
Which amino acid is cannot be found in an alpha helix? Explain.
Homework Answers
Proline and Glycine have poor propensities to form alpha helix. Proline either breaks the helix or introduces a kink in the helix because it cannot donate an amide hydrogen bond (having no amide hydrogen), and also because its sidechain interferes sterically with the backbone of the preceding turn - inside a helix, this forces a bend of about 30° in the helix axis. On the other hand Glycine is conformationally very flexible because of its small size and hence its introduction in the alpha helix is unfavourable.
Why will the phi/psi angles of an amino acid in an alpha-helix be different from the...
Why will the phi/psi angles of an amino acid in an alpha-helix be different from the phi/psi angles of an amino acid in a beta-sheet? How are phi/psi angles possible fro Pro and for Gly different from those of other amino acids?
is there a specific sequence of amino acids required for an alpha helix to form. explain...
is there a specific sequence of amino acids required for an alpha helix to form. explain why or why not
A small generic section of the primary structure of an alpha helix is given below -amino...
A small generic section of the primary structure of an alpha helix is given below -amino acid1-amino acid2-amino acid3-amino acid4-amino acid5-amino acid-6-amino acid7- a.) which amino acid residue's backbone forms a hydrogen bond witht he backbone of the seventh(7th) residue? 6, 1, 3, 2, 5, OR 7? b.) which of the following peptide segments is most likely to be part of a stable alpha helix at physiological pH? a.) -Lys-Lys-Ala-Arg-Ser- b.) -Gly-Arg-Lys-His-Gly- c.) -Pro-Leu-Thr-Pro-Trp- d.) -Gly-Gly-Gly-Ala-Gly- e.) -Glu-Glu-Glu-Glu-Glu- f.) -Glu-Leu-Ala-Lys-Phe-...
There are four amino acid residues between each turn of an alpha helix, because O hydrogen...
There are four amino acid residues between each turn of an alpha helix, because O hydrogen bonding between the carbonyl and amine groups is more stable at this distance. O amino acid residues need a certain amount of distance between then during the turn. O the polar amino acids are more attractive to the peptide bond at this distance. O None of the choices are correct.
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues....
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
A small generic section of the primary structure of an alpha helix is given below. A...
A small generic section of the primary structure of an alpha
helix is given below.
A small generic section of the primary structure of an a helix is given below. -amino acid1 -amino acid2 -amino acid3 -amino acid4 -amino acid5 -amino acid6 -amino acid7 - (a) Which amino acid residue?s backbone forms a hydrogen bond with the backbone of the seventh (7th) residue? Choose the correct residue from the drop-down menu. amino acid Select answer (b) Which of the following...
ter 9. Hemoglobin and Myoglobin Which of these is not found in myoglobin? A) alpha helix...
ter 9. Hemoglobin and Myoglobin Which of these is not found in myoglobin? A) alpha helix b) beta sheetc) heme group, d) globular folding pattern • Which statement about hemoglobin is not true? A) it is globular b) it contains helix loop-helix c) it has three subunits d) it has heme groups · The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these - The...
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...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group 1. d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c)...
1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
There are four amino acid residues between each turn of an alpha helix, because O hydrogen bonding between the carbonyl and amine groups is more stable at this distance. O amino acid residues need a certain amount of distance between then during the turn. O the polar amino acids are more attractive to the peptide bond at this distance. O None of the choices are correct.
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
A small generic section of the primary structure of an alpha
helix is given below.
A small generic section of the primary structure of an a helix is given below. -amino acid1 -amino acid2 -amino acid3 -amino acid4 -amino acid5 -amino acid6 -amino acid7 - (a) Which amino acid residue?s backbone forms a hydrogen bond with the backbone of the seventh (7th) residue? Choose the correct residue from the drop-down menu. amino acid Select answer (b) Which of the following...
ter 9. Hemoglobin and Myoglobin Which of these is not found in myoglobin? A) alpha helix b) beta sheetc) heme group, d) globular folding pattern • Which statement about hemoglobin is not true? A) it is globular b) it contains helix loop-helix c) it has three subunits d) it has heme groups · The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these - The...
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...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group 1. d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
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