BIOL 15b Placement Test Answers

The following are answers to the BIOL 15b placement exam:

  1. D. 
  2. B. (Rods & cones at back, ganglion cells transmit by optic nerve, bipolar in between).
  3. B. 
  4. D. 
  5. D. (Histamine secretion does not involve complement).
  6. D. (Slide 9).
  7. D (Electrons move from high energy state in NADH to low energy state in H2O).

  8. C.
  9. C.
  10. C.
  11. C.
  12. D.
  13. A.
  14. C. (Without H+ grad, ATP synthase does not work, so no ATP for dark reactions).

  15. B.
  16. C.
  17. D. (They dilate).
  18. B.
  19. D.
  20. D.
  21. B.
  22. D. (Function of cytotoxic T cells).
  23. C.
  24. C. (Emphasized that this is unusual because it is a vein that takes blood from one organ to another, rather than to heart).
  25. B. (Slide 41. hCG from embryo mimics LH to maintain corpus luteum, which makes progesterone to maintain lining of uterus).

  26. B.
  27. C.
  28. C.
  29. C.
  30. C. (Already shown).
  31. B.
  32. A. (Because of negative charge).
  33. C. (Slides 33 & 39).
  34. C. (1x6x2).
  35. A. (“not a nutrient of concern for overconsumption” Slide 40).

  36. D.
  37. B.
  38. B. (Maintains a reservoir of O2 to release when concentration is very low in heavy work. A is true but does not help).

  39. C.
  40. C. (Mimic estrogen & progesterone from corpus luteum and prevent hypothalamus from triggering release of FSH & LH. Slide 42).

  41. C.
  42. C. (Codon is 5’CCU3’).

  43. C. (MTs grow from gamma tubulin rings).
  44. A. (Carried mostly in plasma).
  45. D.
  46. D.
  47. D.
  48. D.
  49. B.
  50. C.
  51. C. (Made by ER-bound ribosomes. Some stay, most go to Golgi, lysosomes, plasma membrane, or secreted).

  52. A. (Descendants differentiate into keratinocytes).

  53. A.
  54. D.
  55. B.
  56. A.
  57. A.
  58. B.
  59. A.
  60. C. (Prolongs the "on" state).