Multiple choice] 1. The R-group CH₂C₆H₅ belongs to: a. Arginine b. Phenylalamine c. Cysteine d. Aspartic...
Multiple choice]
1.
The R-group CH₂C₆H₅ belongs to:
a. Arginine
b. Phenylalamine
c. Cysteine
d. Aspartic acid
2.
Choose the INCORRECT statement:
a. Peptides are amino acids joined by a peptide bond.
b. A protein is hydrolyzed to a mixture of ά-amino acids
c. A tripeptide has three peptide bonds.
d. An ά-amino acid is a carboxylic acid with an amine group on the ά carbon.
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Multiple choice]
1.
The R-group CH₂C₆H₅ belongs to:
a. Arginine
b. Phenylalamine
c. Cysteine
d. Aspartic...
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group...
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group peptide bond alpha carbon amine group
. The covalent (ester / amide /hydrocarbon /hydrogen) bond between peptides is responsible for the (primary...
. The covalent (ester / amide /hydrocarbon /hydrogen) bond between peptides is responsible for the (primary /secondary /tertiary /quaternary) structure of a protein. (Delete incorrect answers) (2 pts) 2. (a) Of the twenty amino acids, onlyof them are termed essential amino acids. (1pt (b) What does it mean when an amino acid is termed "essential"? (2 pts) 3. Draw an example of hydrogen bonding between the carbonyl group and the secondary NH group of two different amino acids in the...
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3...
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3 R-C=CH-Coo NH3 NH3 NH3 ONH 3 D) coo B) E) 2) Which of the following amino acids has a sulfur in the R group? A) serine B) cysteine C) asparagine D) tyrosine E) leucine 3) Which of the following terms describes the side chain of valine? A) acidic B) basic C) charged, polar D) uncharged, polar E) nonpolar 4) Which of the following is...
1. There are a total of amino acids are called natural amino acids that are found...
1. There are a total of amino acids are called natural amino acids that are found in proteins. These according to the older Greek letter nomenclature system for designating carboxylic acid structures. 2. True/ False The alpha carbon is the carbonyl carbon of the carboxylic acid functional group of the amino acid. 3. Which of the following are functional groups in an amino acid? (choose all that apply) a. amine b. amide c. carbonyl d. carboxylic acid e. alcohol f....
The one-letter sequence is: WATER a) Draw the peptide (R-groups trans), indicating charges, in pr...
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
1. Partial hydrolysis of lysozyme yielded an octapeptide that was later identified as the N-terminal segment of...
1. Partial hydrolysis of lysozyme yielded an octapeptide that was later identified as the N-terminal segment of the protein. From the following information, determine the sequence of this octapeptide. a. The following amino acids were identified after complete hydrolysis of the octapeptide: Arginine (Arg) Glycine (Gly) Phenylalanine (Phe) Cysteine (Cys) Leucine (Leu) Valine (Val) Glutamic Acid (Glu) Lysine (Lys) b. Treatment of the octapeptide with dinitroflurobenzene (Sanger reagent) followed by complete hydrolysis gave lysine (Lys) labeled with two dinitrophenyl (DNP) groups. c. Treatment of the octapeptide with trypsin gave lysine...
Please point out whether each of the following statements is correct or not. Carefully explain your reasoning! a) In Asp...
Please point out whether each of the following statements is correct or not. Carefully explain your reasoning! a) In Aspartic Acid, the carboxylic group bound to the α carbon has more acidic properties than the carboxylic group that is located in the side chain. b) The pI of Ala-Gly-Met is 6.0. c) The peptide Ile-Ala-Pro is more hydrophilic than the peptide Gln-His-Ala. d) The side chain of Amino Acids that make up a protein function as a buffer. thank you...
Refer to the figure below. BC 0 CH-C-NCHONCH THEO "CH-C-N-CH-C-00 CH & - E - E...
Refer to the figure below. BC 0 CH-C-NCHONCH THEO "CH-C-N-CH-C-00 CH & - E - E - F - 8 CH CHE Asp NH Phe C Lys NH Arg Which of the following is broken during hydrolysis reactions that release the molecule's monomers as products? a. Bond A b. Bond B woled stalla on c. Bond C d. Bond D e. Bond E se 28. An amino acid can be classified by the a. number of amino groups it contains....
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 r...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
What kinds of interactions are NOT part of tertiary protein structure? 3 . A) salt bridges...
What kinds of interactions are NOT part of tertiary protein structure? 3 . A) salt bridges In a hydrolysis reaction, B) hydrophilic interactions A. an acid reacts with an alcohol. C) disulfide bonds E. an este reacts with NaOH. C. anester reacts with H.O. D) peptide bonds D. an acid neutralizes a base. E) hydrophobic interactions E. water is added to markene. . All amino acids have chiral Carbon atoms except a. Val 6. Lys C. ASP d. Ala e....
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group peptide bond alpha carbon amine group
. The covalent (ester / amide /hydrocarbon /hydrogen) bond between peptides is responsible for the (primary /secondary /tertiary /quaternary) structure of a protein. (Delete incorrect answers) (2 pts) 2. (a) Of the twenty amino acids, onlyof them are termed essential amino acids. (1pt (b) What does it mean when an amino acid is termed "essential"? (2 pts) 3. Draw an example of hydrogen bonding between the carbonyl group and the secondary NH group of two different amino acids in the...
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3 R-C=CH-Coo NH3 NH3 NH3 ONH 3 D) coo B) E) 2) Which of the following amino acids has a sulfur in the R group? A) serine B) cysteine C) asparagine D) tyrosine E) leucine 3) Which of the following terms describes the side chain of valine? A) acidic B) basic C) charged, polar D) uncharged, polar E) nonpolar 4) Which of the following is...
1. There are a total of amino acids are called natural amino acids that are found in proteins. These according to the older Greek letter nomenclature system for designating carboxylic acid structures. 2. True/ False The alpha carbon is the carbonyl carbon of the carboxylic acid functional group of the amino acid. 3. Which of the following are functional groups in an amino acid? (choose all that apply) a. amine b. amide c. carbonyl d. carboxylic acid e. alcohol f....
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
Refer to the figure below. BC 0 CH-C-NCHONCH THEO "CH-C-N-CH-C-00 CH & - E - E - F - 8 CH CHE Asp NH Phe C Lys NH Arg Which of the following is broken during hydrolysis reactions that release the molecule's monomers as products? a. Bond A b. Bond B woled stalla on c. Bond C d. Bond D e. Bond E se 28. An amino acid can be classified by the a. number of amino groups it contains....
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
What kinds of interactions are NOT part of tertiary protein structure? 3 . A) salt bridges In a hydrolysis reaction, B) hydrophilic interactions A. an acid reacts with an alcohol. C) disulfide bonds E. an este reacts with NaOH. C. anester reacts with H.O. D) peptide bonds D. an acid neutralizes a base. E) hydrophobic interactions E. water is added to markene. . All amino acids have chiral Carbon atoms except a. Val 6. Lys C. ASP d. Ala e....
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