Card Set Information

2014-11-10 21:35:47
Concepts science

Ch.21 study guide
Show Answers:

  1. Which of the following is a cell?
    a. chicken egg yolk   b. bacterium  c. sperm  d. nerve
  2. Which phrase best describes the inside of a cell?
    full of diverse structures
  3. What is NOT a function of the cell membrane?
  4. Following Hooke's identification of cells with a microscope, how long was it before scientists accepted the cell as the unit of life?
    two centuries
  5. The most sophisticated optical microscopes today can magnify items more than
    1000 times
  6. The hydrophobic ends of a cell membrane's lipid bilayer are
    pressed together
  7. Which pair of organelles transfers energy in the cell?
    mitochondria and chloroplasts
  8. Which is true of ATP?
    a. ATP is a molecule.b. ATP is an energy carrier.c. ATP contains sugar.d. ATP contains phosphorous.
  9. In the process of photosynthesis
    light energy is converted to chemical energy
  10. An organelle not found in the cells of animals is
  11. A cell's receptor molecule
    binds to a molecule to facilitate transfer across the cell membrane.
  12. Which one of the following is in all cells?
  13. Which of the following is a stored energy end product of fermentation?
  14. What is the chief function of the mitochondria?
    to create energy
  15. Which organelle gives the cell a shape?
  16. Which of the following phrases would not be in the definition of photosynthesis?
    starches and fats
  17. The end product for glycolysis is
    pyruvic acid and ATP.
  18. Chromosomes
    a. were first discovered in the nineteenth century.   b. are long strands of DNA   c. come in pairs, located in the nucleus.   d. vary in number with the species.
  19. Fermentation in plants produces  ________; fermentation in animals produces
    alcohol; lactic acid
  20. Anaerobic processes release more energy than aerobic processes.
  21. The mitochondria are thought to be a recent cell mutation.
  22. Only cells can produce other cells.
  23. Cytoplasm is the fluid that takes up spaces between the organelles of a cell.
  24. The resolving power of an electron microscope is limited by the wavelength of the light used to illuminate the specimen.
  25. The primary difference between a prokaryote cell and a eukaryotecell is the nuclear membrane in the latter.
  26. Chloroplasts in plant cells and mitochondria in animal cells are both energy-processing organelles.
  27. Cell membranes can deform to encapsulate a particle and transport it within the cell.
  28. The cytoplasm is to a cell what a skeleton is to a horse
  29. ATP is a molecule that stores and carries energy in its phosphate bonds.
  30. Some cells, like bacteria, do not have a nucleus.
  31. Cellulose and other strong polymers give plant cells support by surrounding the plant cell membrane.
  32. The Krebs cycle happens during the final stages of respiration.
  33. Adenosine triphosphate is an organic molecule that includes ribose sugar in its structure.
  34. What limits the resolving power of all microscopes?
    the wavelength of the light used
  35. Which is the best analogy for a cell membrane?
    ping pong balls covering a birdbath
  36. What advantage does the structure of the cell membrane afford the cell?
    the lowest possible energy state
  37. Which of the following statements about cells is true?
    Meiosis produces cells with half the normal complement of DNA
  38. What does current theory say about the origin of the nucleus?
    A small cell was engulfed by a larger cell.
  39. Which statement is false?
    Anaerobic reactions yield more energy per molecule of glucose than aerobic reactions.
  40. The more chromosomes an organism has, the more complex it is.
  41. During photosynthesis, the chlorophyll molecule in green plants can absorb the Sun's energy only in the wavelength of green light.
  42. Assembling an ATP molecule is an endothermic process in the cell
  43. Receptor molecules in the cell membrane are open gates to all molecules with hydrogen bonds.