When cis peptide bonds are found in proteins, which amino acid is most often flanking that peptide bond? a. Glycine b. Proline c. Alanine d. Cysteine
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When cis peptide bonds are found in proteins, which amino acid is most often flanking that peptide bond?
a. Glycine
b. Proline
c. Alanine
d. Cysteine
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- Write the structure, identify the R groups and describe the chemical properties of these amino acids. A. Alanine B. Serine C. SucroseSelect the two most hydrophobic amino acids. A. Leucine and Isoleucine OB. Arginine and Lysine OC Cysteine and Methionine D. Alanine and Glycine E. Glutamine and AsparagineWhich of these are considered “part” of each amino acid? A. Carboxyl acid group B. All of the options are correct C. R Group D. Amino group
- Identify the components that are consistent between all 20 amino acids in the body. SELECT ALL THAT APPLY A. An amino group B. An Alpha-carbon C. A Carboxyl Group D. A Side chain R GroupWhy do some proteins contain D-amino acids? A. D-amino acids will determine the binding of the protein to its interacting partners. B. D-amino acids will determine whether the structure will be recognized and digested by naturally occurring enzymes C. D-amino acids determines the reactions the proteins will undergo. D. D-amino acids determines the solubility of the protein in aqueous solution. OE. A combination of D and L-amino acids is necessary for the proper folding of protein structures in aqueous solutions.Identify which of the following pairs of amino acid residues can have hydrogen bonding between their side chains. A. Alaine and Glycine B. Leucine and Isoleucine C. Valinc and Asparaginc D. Threonine and Tryrosine
- Consider the structure of the amino acid L-alanine. Which functional groups are common to all amino acids? H COOH NH₂ CH3Which of the following statements is true about amino acids? a. All twenty (20) of these protein-derived amino acids are a-amino acids, meaning that the amino group is located on the carbon alpha to the carboxyl group. b. For nineteen (19) of the twenty (20) amino acids, the a-amino group is primary. Glycine is different; its a-amino group is secondary. c. With the exception of proline, the a-carbon of each amino acid is a chiral center. As shown in Table 27.1, all 19 chiral amino acids have the same relative d. Both a & cSide chains of which two amino acids may participate in peptide bonding? A. Alanine and Glycine B. Phenylalanine and Tryptophan OC. Histidine and Tyrosine D. Glutamic acid and Lysine E. Leucine and Isoleucine
- Classify each of the following amino acid as polar or nonpolar. If polar, indicate if the R group is neutral, acidic, it basic. Indicate if each is hydrophobic or hydrophilic. a. lysine b. arginine c. methionine d. tyrosineWhat type of intermolecular forces exist between the side chains of each of the following pairs of amino acids? a. isoleucine and valine c. Lys and Glu b. threonine and phenylalanine d. Arg and AspWhich of the amino acids will nearly always be found buried in the center of proteins? a. aspartic acid b. arginine c. glycine d. phenylalanine
