Concept explainers
(a)
Interpretation: The net charge on arginine in a high-
Concept introduction: In the solid state and also in solution,
(b)
Interpretation: The net charge on glutamic acid in a high-
Concept introduction: In the solid state and also in solution,
(c)
Interpretation: The net charge on glutamine in a high-
Concept introduction: In the solid state and also in solution,
(d)
Interpretation: The net charge on alanine in a high-
Concept introduction: In the solid state and also in solution,
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General, Organic, and Biological Chemistry
- In a high-pH aqueous solution, indicate whether each of the following amino acids has (1) a net positive charge of 2+, (2) a net positive charge of 1+, (3) a net charge of zero, (4) a net negative charge of 1, or (5) a net negative charge of 2. a. Arginine b. Glutamic acid c. Glutamine d. Alaninearrow_forwardIn a low-pH aqueous solution, indicate whether each of the following amino acids has (1) a net positive charge of 2+, (2) a net positive charge of 1+, (3) a net charge of zero, (4) a net negative charge of 1, or (5) a net negative charge of 2. a. Valine b. Lysine c. Aspartic acid d. Serinearrow_forwardConsider the tripeptide tyrosylleucylisoleucine. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has an acidic side chain?arrow_forward
- What characteristics indicate that amino acids exist as zwitterions?arrow_forwardConsider the tripeptide leucylvalyltryptophan. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has a basic side chain?arrow_forwardTwo proteins with the same amino acid composition do not have to have the same primary structure. Explain why.arrow_forward
- Complete degradation of a protein into individual amino acids involves choose all that are correct: a. Removal of a water molecule from between two amino acids b. Addition of a water molecule between two amino acids c. A hydrolysis reaction d. The breaking of peptide linkagearrow_forwardHow many different primary structures are possible for a four-amino-acid segment of a protein if a. three of the amino acids present must be identical b. the four amino acids must be differentarrow_forwardIn a pleated sheet secondary structure for a protein a. describe the general shape of the protein backbone b. describe the general locations for the amino acid R groupsarrow_forward
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