Concept explainers
(a)
Interpretation: The limiting amino acids present in the given protein source, oats 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 limiting amino acids present in the given protein source, rice 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 limiting amino acids present in the given protein source, corn 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 limiting amino acids present in the given protein source, gelatin 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
- Approximately how many different proteins are present in a typical human cell?arrow_forwardWhat functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?arrow_forwardWhat element is always present in proteins that is seldom present in carbohydrates and lipids?arrow_forward
- What characteristics indicate that amino acids exist as zwitterions?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_forwardOnce cooked, egg whites remain in a solid form. However, egg whites that are beaten to form meringue will partially change back to a jellylike form if allowed to stand for a while. Explain these behaviors using the concept of reversible protein denaturation.arrow_forward
- Two proteins with the same amino acid composition do not have to have the same primary structure. Explain why.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 what way is the protein in a cooked egg the same as that in a raw egg?arrow_forward
- How does secondary protein structure differ from tertiary protein structure?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_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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