4. Another peptide fragment that is 33 residues long is recognized as the most resistant to being digested by ourgastrointestinal proteases and causes immunogenic reactions (allergy-like effects in our intestine). In thesequence: LQLQPFPQPQLPYPQPQLPYPQPQLPYPQPQPF, what are the names of the five repeatingamino acids?b)

In the given sequence of peptide, L, Q, P, F, and Y are five different amino acids.

Answered: 4. Another peptide fragment that is 33…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Please answer the first question (number 7)
1. Determine whether each of the following statements describes the primary, secondary, tertiary, or quaternary stucture of a protein. а. Peptide bonds join amino acids in a polypeptide chain. b. Two polypeptide chains are held together by hydrogen bonds. С. Hydrogen bonds form between adjacent segments of the backbone of the same protein to form a "folded fan" structure. 2. List the type of denaturing agent described by the following treatments: a. disrupting the disulfide bonds in hair to straighten it b. baking the proteins in dough to make bread
Please help
i 3. Identify which of the following pairs of amino acid residues can have London dispersion forces between their side chains. a. Alanine and Glycine b. Leucine and Isoleucine Valine and Asparagine C. d. Threonine and Tyrosine
What are the structures of the amino acids that result from the hydrolysis of all the peptide bonds in the peptide? HO 'N' HO, NH2 H COOH draw structure ... draw structure ... draw structure .. left structure middle structure right structure
Fill in primary, secondary, tertiary or quaternary into the following statements about proteins: Global folding of peptides stabilized by side-chain interactions is known as a ___(A)___ protein. Multiple tertiary structures bonded together is a called a ___(B)___ protein. A ___(C)___ protein is a sequence of amino acids bonded together. A protein in the alpha helix formation is called a ___(D)___ protein, and utilizes H-binding interactions on the amino acid backbone to hold the shape. Select one: a. (A) tertiary, (B) secondary, (C) primary, (D) quaternary b. (A) primary, (B) quaternary, (C) tertiary, (D) secondary c. (A) quaternary, (B) tertiary, (C) primary, (D) secondary d. (A) tertiary, (B) quaternary, (C) primary, (D) secondary
6. The primary structure of a protein involves which of the following? a) Van der Waals forces b) peptide bonds c) hydrogen bonds d) disulfide bonds e) hydrophilic forces
a protein chain. D) removing helping molecules such as heme. E) breaking disulfide bridges. 10) When this tripeptide undergoes acid hydrolysis, what are the amino acids formed? Draw the structures. CH3 O Cys H₂O H₂N-CH-CN-CH₂-C-N-CH-C-0 -CH,−0 Ser Is this bonding polar or non-polar? CH₂S—S-CH₂- CH₂O Phe Cys H Alanylglycylserine (Ala-Gly-Ser, AGS) What type of bonding holds the amino acid R group together? HO CH3 CH₂ H₂O OH NH₂ O Asn 11. What kind of interaction would form between these R groups of an amino acid. Leu Hydrolysis C-CH₂- CH-CH₂- CH₂ O CH₂- 12. What is a peptide bond? How are peptide bond form? Give an example. 13. Draw the structure of tyrosine? Is it a polar or nonpolar amino acid? Draw the major form of tyrosine, pl = 7.3, at a pH of 4 and 2) pH 10 Which structure will not be disrupted during acid hydrolysis a) Amino acid b) Primary structure b) Secondary structure What is a globular protein? True / d) quaternary structure aturation of a protein a.occurs when a change…
When compound C8H17NO2 is heated, a condensation reaction occurs. A new molecule containing one peptide bond is formed, and has the molecular formula C8H15NO. Draw the skeletal structure of this new compound.
Which statement is completely false below? O Amino Acid Polymers less than 50 amino acid residues long are called polypeptides O Aqueous Cysteine is a zwitterion but dry Cysteine is not O When Serine becomes aqueous, the side chain alcohol loses its Hydrogen O All are true O Amino Acids when linked in a peptide bond are called amino acid residues
Which interaction(s) is/are involved in the primary structure of a protein (choose all that apply)? a. hydrogen bonding b. salt bridge c. hydrophobic effects d. covalent peptide bond
Question 7 Select the correct option(s) regarding denaturation of proteins. O Proteins can be denatured by extremes in environmental conditions including Temp and pHt, as well as, upon exposure to high concentrations of oxidants and ure O Disruption of H-bonds can lead to a loss of secondary protein structure and thus denaturation O Following denaturation, some proteins can renature if native bonding can be re-established. O All options shown regarding denaturation of proteins are correct. When bonds that hold the 30 confirmation of an enzyme break, shape of the active site changes, which leads to inefficient binding of substrate molecules 1

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