Chapters 3 & 4: Macromolecules
1. . The major carbohydrate-storage molecule in plants is: a. starch. b. cellulose. c. glycogen. d. deoxyribonucleic acid. e. maltose 2. The helix is an example of which level of protein structure? a. Primary structure b. Quaternary structure c. Secondary structure d. Tertiary structure e. none of the above
3. The number of D-amino acids that occur naturally in proteins is: a. zero. b. 20. c. 19. d. 9. e. none of the above 4. In polysaccharides, sugars are linked together with _______ bonds. a. phosphodiester b. peptide c. glycosidic d. hydrophobic e. emotional 5. The major bonds in glycogen are _______ glycosidic bonds. a b c d e. none of the above
6. Fatty acids are stored in fat droplets in the form of: a. triacylglycerols (triglycerides). b. phospholipids. c. cholesterol. d. glycolipids. e. none of the above 7. Based on their structure, steroid hormones could theoretically be synthesized by simply chemically modifying: 9 . 7
a. cholesterol. b. phospholipids. c. amino acids. d. sugars. e. nucleic acids 8. . In the primary structure of a protein, amino acids are joined together by _______ ___________ bonds. a. covalent - peptide b. noncovalent-phosphodiester c. glycosidic d. hydrophobic e. noncovalent – peptide 9. 1 he interaction of the and subunits to form the hemoglobin molecule is an T example of _______ structure. . 3 1
a. primary b. secondary c. tertiary d. quaternary e. none of the above 10. Which of the following is not involved in forming the tertiary structure of proteins? . 4 1
a. H bonds b. Hydrophobic interactions c. Ionic bonds d. All of the above can be involved. e. none of the above 11. Lipids form the barriers surrounding various compartments within an organism. Which property of lipids makes them a good barrier? a. Many biologically important molecules are not soluble in lipids. b. Lipids are polymers. c. Lipids store energy....