Cell Division & Photosynthesis Lab

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medic11
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183305
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Cell Division & Photosynthesis Lab
Updated:
2012-11-12 20:45:19
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BI 253
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Cell Division & photosynthesis Lab
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  1. What pigment causes leaves to be green?
    Chlorophyll
  2. What is the biochemical process where plants absorb light & convert it to useable chemical bond energy?
    Photosynthesis
  3. Which color in the visible light spectrum has the longest wavelength?
    Red
  4. Which color in the visible light spectrum has the shortest wave length?
    Violet
  5. The green pigment that absorbs light & is directly involved in photosynthesis is called ____.
    Chlorophyll a
  6. What colors of light are readily absorbed by chlorophyll a?
    Violet/Blue & Red
  7. Chlorophyll looks ___ ___ to the eye.
    Bluish Green
  8. ___ ___ also absorb solar energy but they then pass this absorbed energy over to chlorophyll a for photosynthesis.
    Accessory Pigments
  9. What color does chlorophyll b look to our eyes?
    Yellow-Green
  10. ____ absorb a great deal in the blue & green range & appear to our eyes as various shades of yellow or yellow-orange.
    Carotenoids
  11. A ___ ___ layer on a leaf prevents water loss & but also prevents gas exchange.
    Waxy Cuticle
  12. The outer layer of cells on a leaf contain ____ through which gas exchange occurs.
    Stomata
  13. What is the function of air spaces within a leaf?
    Allow diffusion of gasses throughout interior of the leaf to reach all cells
  14. Name 2 functions vascular tissue within leaves.
    • Water & minerals to leaf cells
    • Conduct excess energy rich sugar to other plant parts for storage
  15. Stored glucose molecules are chemically bonded together for later use & stored as ____.
    Starch
  16. What method can be used to separate components of a mixture of molecules?
    Paper Chromatography
  17. What 2 things determine rate at which solvent travels up paper in paper chromatography?
    • Molecules affinity for the paper
    • Molecules solubility in solvent
  18. A completed paper chromatography strip is call a ____.
    Chromatogram
  19. What is happening to a leaf when it is senescing?
    It is declining & dying
  20. Plants that drop their leaves at the beginning of the inhospitable season are called what?
    Deciduous
  21. During the process of senescence a plant does what?
    Strips anything it can fr the leaf & stores it in preparation for dropping the leaf
  22. What is the equation for photosynthesis?
    6CO₂ + 12H₂O + Light → C₆H₁₂O₆ + 6O₂ + 6H₂O
  23. Most of the time DNA is found in a thread like form called ____.
    Chromatin
  24. Chromatin is elaborately wound up into coiled structures called ____.
    Chromosomes
  25. Humans have ___ chromosomes in each body cell.
    46
  26. Homologous prs are matched by what means?
    Physical characteristics
  27. Chromosomes that are not concerned with sex determination are called ____.
    Autosomes
  28. Females have a homologous pr of ____ sex chromosomes but males are ___.
    • X
    • XY
  29. Chromosomes from cells that are undergoing mitosis look how?
    Thickly coiled structures
  30. B/f a new nucleus can be made DNA in each chromosome in each chromosome must what?
    Replicate
  31. The place where chromosomes attach is called the ____.
    Centromere
  32. A cell that contains the correct # of homologous prs for its species is said to be ____.
    Diploid
  33. A cell w/only 1 member of each homologous pr is said to be ___.
    Haploid
  34. The union of a haploid egg & a haploid sperm produces a ___ ____.
    Diploid Zygote
  35. Each strand of a double chromosome is called a ____.
    Chromatid
  36. B/c chromatids are identical those that are attached to each other are called ___ ___.
    Sister Chromatids
  37. What are the phases of mitosis?
    • Prophase
    • Prometaphase
    • Metaphase
    • Anaphase
    • Telophase
  38. In prophase what events take place?
    • Chromosomes condense
    • Spindle begins to develop
    • Nuclear env desintigrates
  39. What are the events of the metaphase?
    • Centrosomes move to opposite ends of cell
    • Chromosomes align on metaphasal plate
  40. During what phase of mitosis do chromatids separate & move towards opposite ends of the spindle?
    Anaphase
  41. What happens during the telophase & cytokinesis?
    Nuclear env reforms & cytoplasms divide
  42. What is overall result of mitosis?
    2 identical cells
  43. A special type of cell division to produce gametes is called ___.
    Meiosis
  44. Each chromosome is a ___ molecule that encodes info & each segment of info is a ___.
    • DNA
    • Gene
  45. How many cells result fr meiosis?
    4
  46. Homologous prs that assoc closely during prophase I are termed ___.
    Tetrad
  47. ___ ___ is the term used to describe homologous chromosomes exchanging pieces of DNA.
    Crossing Over
  48. Crossing over at prophase I is one great source of ___ ___.
    Genetic Variation

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