Concept explainers
(a)
Interpretation: The given food, egg whether contains one or more limiting amino acids or not has to be stated.
Concept introduction: Limiting amino acids are the essential amino acids which are either absent or present in insufficient amounts in an incomplete dietary protein.
(b)
Interpretation: The given food, wheat whether contains one or more limiting amino acids or not has to be stated.
Concept introduction: Limiting amino acids are the essential amino acids which are either absent or present in insufficient amounts in an incomplete dietary protein.
(c)
Interpretation: The given food, corn whether contains one or more limiting amino acids or not has to be stated.
Concept introduction: Limiting amino acids are the essential amino acids which are either absent or present in insufficient amounts in an incomplete dietary protein.
(d)
Interpretation: The given food, soy whether contains one or more limiting amino acids or not has to be stated.
Concept introduction: Limiting amino acids are the essential amino acids which are either absent or present in insufficient amounts in an incomplete dietary protein.
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GENERAL,ORGANIC,+BIO.CHEM.-MINDTAP
- With the help of Table 20-1, identify the amino acids contained in each of the following tripeptides.arrow_forwardTo which family of mirror-image isomers do nearly all naturally occurring amino acids belong?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_forward
- 22-104 Why is collagen not a very good source of dietary protein?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_forward21-85 Which of the following statements is (are) consistent with what is known about membranes? (a) A membrane consists of a layer of proteins sandwiched between two layers of lipids. (b) The compositions of the inner and outer lipid layers are the same in any individual membrane. (c) Membranes contain glycolipids and glycoproteins. (d) Lipid bilayers are an important component of membranes. (e) Covalent bonding takes place between lipids and proteins in most membranes.arrow_forward
- Which 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_forwardHow many carbon atoms are present in the R group in each of the following standard amino acids?arrow_forwardWhat functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?arrow_forward
- For the tripeptide AlaValGly which amino acid residues, if any, a. are hydrophilic b. are hydrophobic c. possess nonpolar R groups d. participate in two amide linkagesarrow_forwardFor the tripeptide SerArgIle which amino acid residues a. are hydrophilic b. are hydrophobic c. possess polar neutral R groups d. participate in two amide linkagesarrow_forwardWith the help of Table 20-1, classify each of the standard amino acids in Problem 20-10 as hydrophobic or hydrophilic.arrow_forward
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