SydneySara55

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sydneysara55
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170129
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SydneySara55
Updated:
2012-09-10 21:48:25
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Biology chapter7
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Biology (chapter 7)
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  1. All cells arise from
    pre-existing cells
  2. The basic unit of structure & function in an organism is the _____
    Cell
  3. As cells size decreases, its surface area-to-volume ratio _______
    decreases
  4. "cells arise only from exsisting cells" is part of the ____________
    Cell Theory
  5. The surface area-to-volume ratio limits a cell's _____
    size
  6. Eukaryotic cells contain specialized structures called __________
    organelles
  7. A cell with a nucleus is a ________ cell
    Eukaryotic
  8. Scientists think that _______ cells evolved about 1.5 billion yrs ago
    eukaryotic
  9. All substances that enter or leave a cell must cross the cell__________
    membrane
  10. The _______ houses a cell's DNA, which contains genetic material
    nucleus
  11. The organelles where protein synthesis occurs in a cell are the _______
    ribosomes
  12. Prokaryotic cells have a cell ______ that surround cell membrane
    wall
  13. Some prokaryotic cells have a ________ that surrounds the cell wall
    capsule
  14. ____________ cells have a system of internal membranes that divides the cytoplasm into compartments
    Eukaryotic
  15. The web of protein fibers that support the shape of cell is____________
    cytoskeleton
  16. The cytoskeleton's network of __________ fibers anchors cell organelles
    protein
  17. A ribosome is made of _____ and many proteins
    RNA
  18. DNA instructions are copied as ____ messages
    RNA
  19. Ribosomes use RNA messages to assemble _________
    protein
  20. The ____________ is a structure that makes ribosomes parts in the nucleus
    Nucleolus
  21. Rough ER has ___________ attatched to its surface
    ribosomes
  22. ____________ ER has no attatvhed ribosomes
    Smooth
  23. Vesicles that contain newly made proteins move through the ____________ from the ER to the Golgi Apparatus
    cytoplasm
  24. Vesicle help maintain _____________ by storing and realeasing various substances as the cell needs them
    homeostasis
  25. Lysosomes work by fusing with other ____________
    vesicles
  26. Photosynethesis takes place in the _______ of plant cells
    chloroplast
  27. Both plant & animal cells have cell membranes. But plant cells are surrounded by a ____________
    cell wall
  28. In multicellular organisms, similar cells group together  to make ____________
    tissue
  29. A group of identical cells that can survive alone if separated are called ____________ organisms
    colonial
  30. What are the three parts of the cell theory?
    • *all cells arise from exsisting cells
    • *Cells are the basic structures & functions in an organism
    • *All living things are made up of 1 or more cells
  31. Whats happens to a cell's surfave area-to-volume ration as the cell gets larger?
    gets smaller
  32. What is the difference in the location of DNA in a prokaryotic cell and in a eukaryotic cell?
    DNA is in the nuclues in eukaryotic cells
  33. What is the functions of organelles in eukaryotic cells?
    carry out specialized functions
  34. What kind of ribosomes make proteins that remain inside the cell?
    free ribosomes
  35. Whats the function of the contractile vacoule in a protist?
    holds and carries out water
  36. What are three extra structures in plant cells?
    Chloroplast, cell wall, central vacoule
  37. What are the levels of organization of cells in multicellular organism
    • organism
    • ^
    • organ system
    • ^
    • organ
    • ^
    • tissue
    • ^
    • cell

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