35. What is the approximate pl for the peptide MEKVDRP. Because this is a peptide, assume the pka for the amino terminus is 9.0 and the pka for the carboxyl terminus is 3.5. a. 4.5 b. 6.5 c. 7.5 d. 9.5 pka's are 3.5 (C-terminus), 4.0 (Glutamic Acid), 3.9 (Aspartic Acid), 9.0 (N-terminus), 10.5 (Lysine), 12.5 (Arginine)

35. What is the approximate pl for the peptide MEKVDRP. Because this is a peptide, assume the pka for the amino terminus is 9.0 and the pka for the carboxyl terminus is 3.5. a. 4.5 b. 6.5 c. 7.5 d. 9.5 pka's are 3.5 (C-terminus), 4.0 (Glutamic Acid), 3.9 (Aspartic Acid), 9.0 (N-terminus), 10.5 (Lysine), 12.5 (Arginine)

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter9: From Dna To Protein

Section: Chapter Questions

Problem 5SQ: The main function of a DNA molecule is to ________ . a. store heritable information b. carry a...

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2. In tabular form explain the specific functions of different of amino acid and how they are acquired in human body.
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1. Use the info of this molecule as well as the attached addendum to demonstrate the flow of genetic information to protein sequence as described by the so-called “Central Dogma” . Clearly indicate the direction of your polynucleotide strands and peptide/protein. ATG GCA TGC AAT AGC TCA TGC 2. What would happen to the amino acid sequence if the underlined nucleotide (C) would change to an A?
The main function of a DNA molecule is to ________ . a. store heritable information b. carry a translatable message c. form peptide bonds between amino acids.
4. Amino acids are linked together by peptide bonds to form polypeptides. (a) Draw the structure of a tripeptide (b) draw an asterisks (*) directly beside all alpha carbons and draw a square around all peptide bonds (c) Use arrows to identify and label the N-terminus and C-terminus (d) Draw a circle around the R group of each amino acid residue in the tripeptide and classify each R group as polar, non polar, acidic, or basic (e) Using the abbreviated names of the amino acids, provide the primary structure of the tripeptide you have drawn.
46. The SH2 protein domain has 2 binding sites: one for ________ and one for _________. A. Phosphotyrosine; {a}- methyltyrosine B. C- Terminus; N-terminus C. Phosphotyrosine; flanking amino acids D. Alpha Helices; Beta-Pleated Sheets
1. Draw three-dimensional representations of the following amino acids. Explain theirstructures.(a) L-phenylalanine(b) L-histidine(c) D-serine(d) L-tryptophan
There is parts A-D for the picture provided. A) A peptide has the sequence, Arg-Cys-His-Tyr-Glu-Asn-Lys-Asp. What is the net charge at pH 1? Choices: -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 B) A peptide has the sequence Arg-Cys-His-Tyr-Glu-Asn-Lys-Asp. What is the net charge at pH 5? Choices: -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 C) Same Peptide sequence, What is the net charge at pH8.5, (N-terminus is pronated) Choices: -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 D) A peptide has the sequence, Arg-Cys-His-Tyr-Glu-Asn-Lys-Asp. What is the net charge at pH 13? Choices: -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 Thank You!
1. A certain polypeptide was treated with trypsin and yielded the following Fragments: Leu-Glu Gly-Tyr-Asn-Arg Gln-Ala-Phe-Val-Lys The same polypeptide was treated with chymotrypsin and yielded the following fragments: Gln-Ala-Phe Asn-Arg-Leu-Glu Val-Lys-Gly-Tyr What is the amino acid sequence of this polypeptide? Instructions Make use of the table below to determine the sequence of the mystery protein.
6. Please describe the events that may result in a mature protein not having methionine asthe N-terminal amino acid.
1. How many different tripeptides are possible? How many carboxyl terminals of polypeptide chains are present in a molecule of hemoglobin? 2. You have isolated a pentapeptide composed of four glycine residues and one lysine residue that resides at the C-terminus of the peptide. Using the information provided in the legend of Figure 2.27, if the pK of the side chain of lysine is 10 and the pK of the terminal carboxyl group is 4, what is the structure of the peptide at pH 7? At pH 12? 3. The side chains of glutamic acid (pK 4.3) and arginine (pK 12.5) can form an ionic bond under certain conditions. Draw the relevant portions of the side chains and indicate whether or not an ionic bond could form at the following: (a) pH 4; (b) pH 7; (c) pH 12; (d) pH 13.