8.1-2 Biology

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Across
  1. 1. some substances can pass across them while others cannot
  2. 4. small organelles filled with enzymes
  3. 8. a thin flexible barrier that surrounds a cell
  4. 9. small particles of RNA and protein found throughout the cytoplasm
  5. 10. the basic units of all living things
  6. 12. a strong supporting layer around the membrane
  7. 14. the power plant of the cell
  8. 16. a network of protein filaments that gives eukaryotic cells their shape
  9. 18. large saclike, membrane enclosed structures that store water, salts, proteins, and carbohydrates
  10. 19. cells that do not enclose their DNA in nuclei
Down
  1. 2. an internal membrane system contained in eukaryotic cells
  2. 3. a stack of flattened membranes that proteins are moved into
  3. 5. the biological equivalent of a power plant, in a plant
  4. 6. gives cell membranes a flexible structure that forms a strong barrier between the cell and its surroundings
  5. 7. a fundamental concept of biology
  6. 11. the portion of the cell outside the nucleus
  7. 13. cells that enclose their DNA in nuclei
  8. 15. a large membrane-enclosed structure that contains genetic material in the form of DNA
  9. 17. the structures inside a cell that act like “little organs”