9. Cholesterol is a(n) ____ needed to build cell membranes.
b. lipid
10. An unsaturated lipid contains _____.
c. double bonds
11. Which bonds are created during the formation of the primary structure of a protein?
d. peptide bonds
12. Which element would need to be removed from a saturated fatty acid to make it unsaturated?
d. hydrogen
13. Which of the following is (are) true about the carbon atoms present in all organic molecules?
Not a very good question, and I'm not sure the answer I give is the one your teacher/book wants.
c. They are ultimately derived from carbon dioxide.
14. If 128 molecules of glucose were covalently joined together in sequence, the single molecule that would result would be a
d. polysaccharide.
15. Which of the following is not one of the four major groups of macromolecules found in living organisms?
a. glucose
16. Which of the following are polysaccharides?
a. glycogen
b. starch
c. chitin
e. A, B, and C <-- answer
17. Which of the following is (are) true for the class of large biological molecules known as lipids?
a. They are insoluble in water.
b. They are an important constituent of cell membranes.
c. They contain twice as much energy as an equivalent weight of polysaccharide.
d. Only A and B are correct. <--- I believe this is correct, but it depends on whether or not C is true. e. A, B, and C are correct. <-- This may be correct, if C is true.
18. Polysaccharides, lipids, and proteins are similar in that they
b. are synthesized from monomers by dehydration reactions.
19. All of the following molecules are proteins except
e. glycogen.
20. Which of the following does NOT describe a polymer?
d. Polymers are broken down by the process of hydrogenation.
21. _____ represents a formula for a chemical compound.
d. H2O
22. When molecules of glucose and fructose combine to form sucrose, they do so by _____.
c. dehydration synthesis
23. The various enzymes in our bodies are _____.
d. proteins
24. The total number of atoms in a molecule of sucrose, C12H22O11, is _____.
d. 45
25. Diffusion continues until there is no _____.
c. concentration gradient