5. The tertiary structure of a protein involves attractions and repulsions between the side chain groups of the amino acids of the polypeptide. What type of interactions would you expect between the R groups of the following amino acids? • Phenylalanine and phenylalanine- • Serine and threonine- • Two cysteine residues - • Two leucine residues - Arginine and aspartic acid-

5. The tertiary structure of a protein involves attractions and repulsions between the side chain groups of the amino acids of the polypeptide. What type of interactions would you expect between the R groups of the following amino acids? • Phenylalanine and phenylalanine- • Serine and threonine- • Two cysteine residues - • Two leucine residues - Arginine and aspartic acid-

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter3: Biological Molecules: The Carbon Compounds Of Life

Section: Chapter Questions

Problem 8TYK: The first and major effect in denaturation of proteins is that: a. peptide bonds break. b. helices...

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1.Describe in detail how to detect the primary structure of protein. 2.Given a mixture of lysine,histidine and cysteine.The isoelectronic point of the amino acids are as follows: histidine:7.64 lysine:9.74 cysteine:5.02 Show how you will separate the mixture into the pure forms. State and describe any instrument that you will use to separate the components in the mixture.
1.Describe in detail how to determine the primary structure of protein. 2.You have been given a mixture of lysine, histidine and cysteine.The isoelectric point of the amino acids are as follows; histidine 7.64 lysine:9.74 cysteine:5.02 Show how you will separate the mixture into the pure forms. State and describe any instrument that you will use to separate the components in the mixture.
6.All of the following types of interactions cooperate in stabilizing the tertiary structures of globular proteins except____. a.Disulphide bond b.Hydrogen bond c.Ionic interactions d.Peptide bond
5 (a) Describe in detail how you will determine the primary structure of protein. You have been given a mixture of lysine, histidine and cysteine. The isoelectric point of the amino acids are as follows: Histidine 7.64 Lysine 9.74 Cystenie 5.02 Show how you will separate the mixture into the pure forms. State and describe any instrument that you will use to separate the components in the mixture.
1. What is the isoelectric point (pI) of lysine which has pKa values of 2.1 for the α carboxyl group, 9.7 for the α amino group and 10.5 for the side chain amino group? 2. Which of the following is most likely to be found on the exterior of a protein? A) Pro B) Trp C) Ser D) Glu 3. The type of reaction that forms a peptide bond is A) Elimination B) Hydrolysis C) Nucleophilic substitution D) Condensation
6. Which amino acid would most likely be found on the surface of a protein molecule at physiological pH? a. Isoleucine b. Lysine c. Alanine d. Proline 7. Which of the following statements about terpenes is NOT true? a. They are a type of terpenoid. b. They all contain double bonds. c. They are all made up of 5-carbon units. d. They all contain oxygen. 8. How are the plasma membranes of mammalian and bacterial cells similar? a. They typically contain cholesterol. b. They have negatively charged lipids on their surfaces. c. They contain lipids that are involved in signal transduction. d. They are made up of many different types of phospholipids.
4. Write the structure of each of the following peptides at pH 7: a. Alanylphenylalanine b. Threonylcysteine c. Phenylalanyltryrosylleucine d. Glycylvalylserine 5. Tripeptides are composed of three amino acids linked by peptide bonds. Given a set of amino acids, you can make several different tripeptides. a. Use the three-letter shorthand notations to name all the tripeptides that can be made from serine, tyrosine, and glycine. Each amino acid will be used once in each tripeptide. b. Draw the complete structure of the tripeptides that have glycine as the N-terminal amino acid.
1.Here is an oligomeric protein, which has two binding sites:1)Write the formulas of side chains of amino acids which are located in binding sites and suggest two ligands,which can be bound with this protein. 2) Name the types of bonds which will be formed between the ligands and amino acids of binding sites.3)Give the definition of quaternary structure. What do you know about the properties of proteins with the quaternary structure?
1. Sickle cell anemia results from a substitution of a valine for a glutamic acid. What do you expect the effect might be if the mutation were to have placed a leucine at that site? An aspartic acid? 2. Of the following amino acids, glycine, isoleucine, and lysine, which would you expect to be the most soluble in an acidic aqueous solution? Which the least? 3. How many structural isomers could be formed from a molecule with the formula C5H12? C4H8?
1)Explain 3 benefits of proteins forming higher oligomeric states. 2) Why are peptide bonds planar?
1) Describe the importance of the amino acids in the structure such as the alpha helix in the secondary structure; the beta-sheet and the alpha helix in the final tertiary structure. 2) A photo of a 3D tertiary structure model of your protein using paper.
3a) The 3° structure of a protein refers to the protein's overall, 3-dimensional shape in space. This will incorporate any 2° structure the protein has, but is predominantly the result of side-group interactions. Name the type of interaction, if any, that you would expect to see under physiological conditions (an aqueous solution at pH 7.0-7.5) between the following pairs of amino acid side groups. Serine and asparagine: Methionine and lysine: Glutamate and aspartic acid: Alanine and phenylalanine: