Concept explainers
(a)
Interpretation: The validation about the classification of lysine as an essential amino acid has to be stated.
Concept introduction: The standard amino acids which are required for the synthesis of protein are called essential amino acids. The human body cannot synthesise the essential amino acids, so they should be taken through diet.
(b)
Interpretation: The validation about the classification of glycine as an essential amino acid has to be stated.
Concept introduction: The standard amino acids which are required for the synthesis of protein are called essential amino acids. The human body cannot synthesise the essential amino acids, so they should be taken through diet.
(c)
Interpretation: The validation about the classification of Glu as an essential amino acid has to be stated.
Concept introduction: The standard amino acids which are required for the synthesis of protein are called essential amino acids. The human body cannot synthesise the essential amino acids, so they should be taken through diet.
(d)
Interpretation: The validation about the classification of Met as an essential amino acid has to be stated.
Concept introduction: The standard amino acids those are required for the synthesis of protein is called essential amino acids. The human body cannot synthesise the essential amino acids, so they should be taken through diet.
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GENERAL,ORGANIC,+BIO.CHEM.-MINDTAP
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- What characteristics indicate that amino acids exist as zwitterions?arrow_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_forwardWhich is NOT a characteristic of proteins? a. They contain genetic information. b. They can act as hormones. c. They can catalyze chemical reactions. d. They act in cell membrane trafficking.arrow_forward
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- Which 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_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 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_forward
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