Side chains of which two amino acids may participate in peptide bonding? A. Alanine and Glycine B. Phenylalanine and Tryptophan C. Histidine and Tyrosine D. Glutamic acid and Lysine O E. Leucine and Isoleucine
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![Side 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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F92756ff9-90e2-4c3c-90cf-dce0881ff676%2Fa3a3cca6-f350-47db-8d00-1bd8d4e97326%2Fpy1i3ta_processed.png&w=3840&q=75)
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- Acid hydrolysis of proteins in order to determine the amino acid composition leaves most of the amino acid residues intact but: O a. converts asparagine to aspartic acid O b.oxidizes leucine to isoleucine O c. destroys glutamic and aspartic acid O d. destroys the basic amino acids O e. destroys prolineSelect 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 AsparagineDuring the formation of the peptide bond which of the following takes place? Select one: a. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid b. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid c. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid d. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid Clear my choice
- During the formation of the peptide bond which of the following takes place? A. Hydroxyl group is lost from its Carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid B. Hydrogen atom is lost from its Carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid C. Hydroxyl group is lost from its Carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid D. Hydrogen atom is lost from its Carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acidThe amino acid that accounts for disulfide bonds in the tertiarystructure of proteins isa. tyrosineb. glycinec. cysteined. serineThe dynorphins are a group of opioid peptides that play an important role in changes in the brain associated with cocaine addiction. One of these peptides, dynorphin A, contains the following amino acid sequence: Tyr–Gly–Gly–Phe–Leu–Arg–Arg–Ile–Arg–Pro–Lys–Leu–Lys. Draw the amino acids and peptide fragments formed when dynorphin A is treated with each reagent or enzyme: (a) chymotrypsin; (b) trypsin; (c) carboxypeptidase; (d) C6H5N=C=S.
- Compare and contrast the biological roles of the following amino acids the following pairs ofamino acids. Once you have documented these role state which member of the pair is most important and why.Consider the structure of the amino acid L-alanine. Which functional groups are common to all amino acids? H COOH NH₂ CH3What does it mean for an amino acid to be polar? Please explain what qualities about an amino acid might make the amino acid polar. The disease known as sickle cell anemia is due to a genetic mutation which replaces glutamic acid, a polar amino acid with valine. Please explain how this affects the hemoglobin.
- 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 TryrosineWhich among the following indicates correct the three-letter abbreviation and one-letter abbreviation for the specified amino acid? O Tyrosine (Tyr. T) Glutamine (Gln, Q) Phenylalanine (Phe, P) Asparagine (Asp. D)Indicate whether each of the following amino acids is polar: a. lysine b. tyrosine c. leucine d. asparagine e. proline f. cysteine g. glutamic acid h. valine i. histidine j. glycine
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