ASSIGNMENT (Practice Exam)
(ANSWER KEY)
Write the letter of the response that represents the best choice on the practice exam.
ANSWER SHEET FOR PRACTICE TEST ASSIGNMENT
1. E
2. E
3. B
4. E
5. B
6. E
7. A
8. B
9. A
10. B
11. D
12. E
13. E
14. A
15. E
16. B
17. C
18. B
19. B
20. Mistake on
practice test;
best answer
would have been
fatty acyl CoA
which is
converted later
to Acetyl CoA.
21. A
22. C
23. D
24. D
25. A
26. D
27. A
28. A
29. B
30. A
31. D
32. C
33. D
34. A
35. B
36. B
37. D
38. E
39. D
40. B
41. C
42. E
43. B
44. B
45. C
46. C
47. A
48. D
49. C
50. A
51. C
52. C
53. E
54. A
EXTRA CREDIT EXERCISE (Crossword Puzzle)
(ANSWER KEY)
Across
2. In cellular respiration, series of anaerobic chemical reactions in the cytoplasm that break down
glucose into pyruvic acid; forms a net profit of two ATP molecules. ANSWER: GYLCOLYSIS
10. Chemical process where mitochondria break down food molecules to produce ATP; the three
stages are glycolysis, the citric acid cycle, and the electron transport chain. ANSWER: CELLULAR
RESPIRATION
12. Molecules that absorb specific wavelength of sunlight. ANSWER: PIGMENTS
13. In cellular respiration, series of reactions that break down glucose and produce ATP; energizes
electron carriers that pass energized electrons on to the electron transport chain. ANSWER:
CITRIC ACID CYCLE
14. Process by which autotrophs, such as algae and plants, trap energy from sunlight with chlorophyll
and us this energy to convert carbon dioxide and water into simple sugars. ANSWER:
PHOTOSYNTHESIS
15. Series of proteins embedded in a membrane along which energized electrons are transported; as
electrons are passed from molecule to molecule, energy is released. ANSWER: ELECTRON
TRANSPORT
Down
1. Anaerobic process where cells convert pyruvic acid into carbon dioxide and ethyl alcohol; carried
out by many bacteria and fungi such as yeast. ANSWER: ALCOHOLIC FERMENTATION
3. Energy-storing molecule in cells composed of an adensosine molecule, a ribose sugar and three
phoshate groups; energy is stored in the molecules's chemical bonds and can be used quickly and
easily by cells. ANSWER: ADENOSINE TRIPHOSPHATE
4. Phase of photosynthesis where light energy is converted to chemical energy in the form of ATP;
results in the splitting of water and the release of oxygen. ANSWER: LIGHT REACTIONS
5. Electron carrier molecule; when carrying excited electrons, it becomes NADPH. ANSWER: NADP
6. Reaction taking place in the thylakoid membranes of a chloroplast during the light-dependent
reactions where two molecules of water are split to form oxygen, hydrogen ions, and electrons.
ANSWER: PHOTOLYSIS
7. Light-absorbing pigment in plants and some protists that is required for photosynthesis; absorbs
most wavelengths of light except green. ANSWER: CHLOROPHYLL
8. Molecule formed from the breaking off of a phosphate group from ATP; results in a large release
of energy that is used for biological reactions. ANSWER: ADENOSINE DIPHOSPHATE
9. Series of reactions during the light-independent phase of photosynthesis in which simple sugars
are formed from carbon dioxide using ATP and hydrogen from the light-dependent reactions.
ANSWER: CALVIN CYCLE
11. Phase of photosynthesis where energy from light-dependent reactions is used to produce glucose
and additional ATP molecules. ANSWER: LIGHT INDEPENDENT