Biology 110 Exam 3 - Fall 2000

1. Molecules of _?_ are the most important end product of all types of cellular respiration.

2. True or False The process of cellular respiration manufactures energy.

3. How many carbon atoms are present in one molecule of glucose?

4. How many carbon atoms are present in one molecule of pyruvic acid?

5. How many carbon atoms are present in one molecule of ethyl alcohol?

6. During the alcoholic fermentation of one molecule of glucose, how many molecules of carbon dioxide are produced?

7. During the alcoholic fermentation of one molecule of glucose, how many molecules of ethyl alcohol are produced?

8. Name one of the end products of lactic acid fermentation of glucose.

  1. oxidized;
  2. reduced;
  3. manufactured

10. Which of the following best describes glycolysis?

  1. anaerobic;
  2. aerobic

11. How many nitrogen bases are present in one molecule of nicotinamide adenine dinucleotide?

12. Reduction involves the:

  1. loss of electrons;
  2. the gain of electrons;
  3. the destruction of electrons.

13. True or False Cellular respiration occurs in all normal living cells, including those in which photosynthesis occurs.

14. The primary function of nicotinamide adenine dinucleotide molecules is to:

  1. temporarily store information;
  2. store information for long periods of time;
  3. temporarily store energy;
  4. store energy for long periods of time.

15. All electrons contain the same amount of energy. The preceding statement is:

  1. definitely true;
  2. false;
  3. probably true but there is no way to prove it.

16. What is the name of the process that describes the movements of small, solid particles due to their being hit by moving water molecules?

17. The primary chemical components of cell membranes are:

  1. carbohydrates;
  2. nucleic acids;
  3. phospholipids;
  4. sucrose;
  5. ATP

18. Which will diffuse the slowest?

  1. glucose, a monosaccharide;
  2. sucrose, a disaccharide;
  3. starch, a polysaccharide

19. According to the principle of diffusion, molecules will move (by means of their kinetic energy):

  1. from areas of high concentration to areas of low concentration;
  2. from areas of low concentration to areas of high concentration;
  3. randomly in all directions.

20. True or False Water molecules can penetrate the hydrophilic zone of a phospholipid molecule.

21. Through which of the following will the gas hydrogen sulfide diffuse the fastest?

  1. air;
  2. water;
  3. Jello

22. A membrane that is permeable will allow:

  1. no molecules to pass through;
  2. all molecules to pass through;
  3. some, but not all, molecules to pass through.

23. Osmosis involves the diffusion of a substance called _?_ through a differentially permeable membrane.

24. Which of the following correctly describes a hypertonic solution?

  1. contains more liquid (= solvent) than another solution;
  2. contains more dissolved material (= solute) than another solution;
  3. does not contain any solvent or solute.

25. A solution is hypertonic to a cell. If the cell is placed into that solution, the cell will:

  1. gain weight;
  2. loose weight;
  3. not change weight.

26. Two solutions are described as being isotonic. Which of the following best describes these two solutions? The solutions:

  1. are at the same temperature;
  2. have the same color;
  3. contain the same amount of dissolved material;
  4. are probably poisonous.

27. Which of these results in the movement of molecules from an area of low concentration to an area of high concentration?

  1. osmosis;
  2. diffusion;
  3. active transport;
  4. none of these

28. Which of the following is the most energetically expensive to a cell (i.e., uses the most energy)?

  1. osmosis;
  2. diffusion;
  3. active transport

29. A living cell that contains 1% dissolved material is placed into a solution that contains 3% salt and 97% water. Which of the following correctly describes the salt solution?

  1. hypertonic;
  2. hypotonic;
  3. isotonic

30. A living cell that contains 1% dissolved material is placed into a solution that contains 3% salt and 97% water. In which direction will there be a net movement of water?

  1. into the cell;
  2. out of the cell;
  3. could be either into or out of the cell depending on the temperature.

31. What is the primary function of photosynthesis?

  1. manufacture energy;
  2. store energy in carbohydrates;
  3. manufacture ATPs

32. Name a gas released as a by-product of the light dependent reactions of photosynthesis.

33. When chlorophyll P680 absorbs sunlight, what subatomic particle actually has a change in energy content?

  1. electron;
  2. proton;
  3. neutron

34. When chlorophyll P680 loses an electron, from what atom does the chlorophyll receive an electron?

35. Which contains more energy:

  1. one molecule of NADP;
  2. one molecule of NADP-H

36. Name the molecule that is taken from the environment and that provides the carbon for the production of carbohydrates during the Calvin cycle.

37. Which has the most energy?

  1. one photon of red light;
  2. one photon of green light;
  3. one photon of blue light;
  4. all photons have the same amount of energy.

38. Chlorophyll is green because it _?_ green wavelengths of light.

  1. absorbs;
  2. reflects;
  3. transmits

39. In eukaryotic cells, photosynthesis occurs in organelles named _?_

40. How many molecules of carbon dioxide must enter the Calvin cycle in order for the plant to produce a carbohydrate containing 48 carbon atoms?

41. Which contains more energy?

  1. one molecule of phosphoglyceraldehyde (PGAL);
  2. three molecules of carbon dioxide;
  3. one molecule of glucose;
  4. one molecule of starch.

42. "Packets" or "particles" of light are called _?_

43. What would happen to humans and most other living organisms on Planet Earth if photosynthesis stopped?

  1. nothing;
  2. death due to shortage of food or oxygen;
  3. food habits would change but animal life would continue.

44. Which has more energy?

  1. short wavelengths of electro-magnetic radiation;
  2. long wavelengths of electro-magnetic radiation

45. At the end of the light dependent reaction of photosynthesis, energy is temporarily stored in molecules of nicotinamide adenine dinucleotide phosphate and _?_

46. Each of us is breathing in oxygen from the surrounding air. Name the biological process that released the oxygen molecules into the air.

  1. photosynthesis;
  2. cell respiration;
  3. active transport;
  4. alcoholic fermentation

47. The primary chemical component in plant cell walls is cellulose, which is a polymer of glucose and contains many carbon atoms. Name the molecule that provides carbon atoms to plants that are manufacturing cellulose.

  1. carbon dioxide;
  2. oxygen;
  3. photons;
  4. enzymes

48. The term "phosphorylation" means:

  1. removing a phosphate;
  2. adding a phosphate;
  3. destroying a phosphate;
  4. manufacturing a phosphate

49. Each of the following is needed in order to manufacture a molecule of adenosine triphosphate. The absence of which of these will usually limit the number of ATP molecules manufactured by a cell?

  1. phosphate;
  2. adenosine diphosphate;
  3. energy;
  4. enzyme

[Pitts Home]