Lab Exam #2

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Lab Exam #2
2010-12-13 11:26:17
lab exam biology montgomery college

Montgomery College Lab Exam #2
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  1. What is the aerobic cellular respiration?
    Gluocose + Oxygen --> Carbon dioxide + water + ATP
  2. What was the anme of the instrument that we used in the cellular respiration lab?
  3. What does a manometer measure?
    Amount of oxygen consumed
  4. During this experiment, the fluid level moved (towards/away from) the gerbil because of changes in __________ as the animal respired.
    towards, gas or air pressure
  5. An organism whose body temperature ______ with the outside environment is called an ______ or ______. Its metabolic rate (increases/decreases) as temperature increased.
    ectotherm or poikilotherm, increases
  6. An organism who is able to maintain a stable body temperature regardless of the environmental temperature is called an ______ or _______. Its metabolic rate (increases/decreases) as temperature increases.
    endotherm or homeotherm, decreases
  7. What is the reaction for photosyntheses?
    Carbon dioxide + water --> glucose + oxygen
  8. Which type of energy is used in this reaction?
    Sunlight energy
  9. What absorbs sunlight energy?
  10. After carbon dioxide was blown into the test tube, what color was the bromothymol blue solution?
  11. Why did the color change yellow after the carbon dioxide was blown into the solution?
    The solution became acidic due to the production of carbonic acid.
  12. As photosynthesis occurred, the color changed to ____ because
    blue; carbon dioxide was being used by the plant for photosynthesis so the environment was becoming more alkaline
  13. A spectrophotometer measures
    absorption of light wavelengths
  14. Paper chromatography seperates pigments on the basis of which 3 properties?
    • a) molecular weight
    • b) solubility in the solvent
    • c) affinity for the chromatography paper
  15. What color does carotenes represent?
    Bright yellow
  16. What color does xanthophyll represent?
  17. What color does chlorophyll a represent?
  18. What color does chlorophyll b represent?
  19. How many daughter cells are produced by mitosis?
  20. How does the number of chromosomes in each daughter cell compare with the number of chromosomes in the orginal parent cell after mitosis?
    Same number and type of chromosomes
  21. When are chromosome replicated?
    During interphase
  22. During cytokinesis plant cells form a ____ _____ while animal cells form a _____ ______.
    cell plate, cleavage furrow
  23. What does PCR allow scientists to do in a relatively short amount of time?
    Produce millions of copies of a specific DNA sequence
  24. List the steps of the polymerase chain reaction
    Denaturation, annealing, extension
  25. What happens to the template DNA when it is heated to 95 degrees?
    The double strand melts to single stranded DNA
  26. What does "anneal" mean?
    The reformation of double stranded DNA from thermally denatured DNA
  27. What is annealed to each of the DNA strands?
    The primers bind to the single strand created in the previous PCR step
  28. What is the temperature of the third step?
    54 degrees
  29. What enzyme is used to extend the primers?
    TAQ DNA polymerase
  30. What technique was used to analyze the PCR products?
    AGarose gel electrophoresis
  31. How idd you find the guilty party in the cash car caper investigation?
    The DNA banding pattern of the perpetrator matched the one found
  32. The law of _______ says that homologous chromosomes end up in different gametes after meiosis
  33. What is the law of independent Assortment
    homologus chromosomes and the respective alleles segregate independently during meiosis and end up in different gametes