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
- Consider 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_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_forwardWhat characteristics indicate that amino acids exist as zwitterions?arrow_forward
- What functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?arrow_forwardTwo proteins with the same amino acid composition do not have to have the same primary structure. Explain why.arrow_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_forward
- To which family of mirror-image isomers do nearly all naturally occurring amino acids belong?arrow_forwardWhich of the following describes the primary structure of proteins? a. The collective shape assumed by all of the chains in a protein containing multiple chains. b. The folding of an individual protein molecule. c. The regular repeated shape of the protein molecules backbone. d. The sequence of amino acids bonded together by peptide bonds.arrow_forwardWhich of the following are true concerning the chemical bond that forms between the carboxyl (RCOOH) group of one amino acid and the amino (RCNH2) group of another? a.The bond is called a peptide bond. b.It is formed by inserting a water molecule between them. c.It is formed by a dehydration reaction. d.A polypeptide has more of these bonds than a protein.arrow_forward
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