Biology Chapter 3

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Biology Chapter 3
2014-02-12 10:24:19
Biology science
Bio chapter 3
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  1. What are the two things the Plasma Membrane does?
    1. It separates a cell from it's environment

    2.Enables transfer of information between environment and cell
  2. The plasma membrane is selectively permeable, what does selective permeable mean?
    It means that the plasma membrane permits movement of some substances into and out of the cell, but blocks others
  3. The plasma membrane is a lipid bilayer, what are the 4 things it is made up of?
    1. Phospholipids

    2. Cholesterol

    3. Proteins

  4. What are phospholipids?
    Polar head and nonpolar tail
  5. What does the cholesterol do?
    Makes membrane a bit more rigid
  6. What does the proteins do?
    Provide means of transport through membrane
  7. What do the Carbohydrates do?
    Recognition patterns for cells and organisms
  8. The plasma membrane is non-rigid and Fluid mosaic
  9. What is bulk transport?
    It involves membranous vesicles to move larger substances, which are Endocytosis and Exocytosis
  10. What is endocytosis?
    Bringing substances to the cell, as substance enters the membrane it is surrounded by a membrane forming a vessel
  11. What is exocytosis?
    Expels substances from the cell, substances is contained within a membrane vescile which then fuses with the membrane, releasing the substance to the external environment
  12. What is Glycolysis?
    The split into two pyruvate molecules, this occurs in the cytoplasm.
  13. What does the Critic Acid cycle do?
    It harvests energy, occurs in mitochondria
  14. Which molecule accepts acetyl CoA is regenerated at the end of one full turn of it?
  15. The Critic Acid Cycle produces what?
    Two ATP and four CO2 per glucose molecule
  16. What are ribosomes responsible for?
    protein synthesis
  17. What do the free ribosomes do?
    They synthesize proteins for immediate use in the cell
  18. What do bound ribosomes do?
    Synthesize proteins that will be transported to other organelles or exported from the cell
  19. What does the Rough endoplasmic do?
    It manufactures proteins, particularly those that will be secreted from the cell
  20. What are the two sources of energy?
    1. Fat

    2. Glycogen
  21. What does fat do?
    Long-term energy storage in animals, triglycerides
  22. What is glycogen?
    it's a storage for carbohydrates, and short-term energy storage in animals.