Concept explainers
Interpretation:
The difference in the ester bonds in lipids that do not give rise to macromolecules and the amide bonds in proteins that do should be explained.
Concept Introduction:
Macromolecules play important roles in the structural arrangement of the cell. They are formed by the combination of monomers which are smaller molecules to form
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Student Solutions Manual for Bettelheim/Brown/Campbell/Farrell/Torres' Introduction to General, Organic and Biochemistry, 11th
- 21-101 Glycerophospholipids tend to have both a positive charge and a negative charge in their hydrophilic portions. Does this fact help or hinder lipid packing in membranes? Explain.arrow_forward21-90 To what extent do lipids and carbohydrates play structural roles in living organisms? Do these roles differ in plants and in animals?arrow_forward22-53 Do iron and zinc ions play role in protein structure? If so, what is the role for either or both?arrow_forward
- 22-62 Distinguish between intermolecular and intramolecular hydrogen bonding between backbone groups. Where in protein structures do you find one, and where do you find the other?arrow_forward21-3 Proteins, nucleic acids, and carbohydrates are grouped by common structural features found within their group. What is the basis for grouping substances as lipids?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
- 22-49 Based on your knowledge of the chemical properties of amino acid side chains, suggest a substitution for leucine in the primary structure of a protein that would probably not change the character of the protein very much.arrow_forward21-7 For the diglycerides in Problem 21-6, predict which two will have the highest melting points and which two will have the lowest melting points.arrow_forward22-104 Why is collagen not a very good source of dietary protein?arrow_forward
- For 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_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_forwardGive an example of amino acids that could give rise to the interactions pictured in Fig. 21-24 that maintain the tertiary structures of proteins.arrow_forward
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