Chapter 7 Vocabulary

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Across
  1. 1. the center of the atom which contains the protons and neutron; in cells, structure that contains the cell's genetic material (DNA) and controls the cell's activities
  2. 4. when the concentration of two solutions is the same
  3. 8. diffusion of water through a selectively permeable membrane
  4. 9. threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next
  5. 10. specialized structure that performs important cellular functions within a eukaryotic cell
  6. 15. cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use
  7. 17. strong supporting layer around the cell membrane in plants, algae, and some bacteria
  8. 18. small, dense region within most nuclei in which the assembly of proteins begins
  9. 21. one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope
  10. 22. internal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modified
  11. 23. network of protein filaments within some cells that helps the cell maintain its shape and is involved in many forms of cell movement
  12. 24. organism whose cells contain nuclei
  13. 25. cell organelle that stores materials such as water, salts, proteins, and carbohydrates
  14. 28. stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum
  15. 29. material inside the cell membrane-not including the nucleus
  16. 30. process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated
Down
  1. 2. cell organelle filled with enzymes needed to break down certain materials in the cell
  2. 3. small particle in the cell on which proteins are assembled; made of RNA and protein
  3. 5. when comparing two solutions, the solution with the lesser concentration of solutes
  4. 6. granular material visible within the nucleus; consists of DNA tightly coiled around proteins
  5. 7. single-celled organism lacking a nucleus
  6. 11. when the concentration of a solute is the same throughout the solution
  7. 12. organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy
  8. 13. thin, flexible barrier around a cell; regulates what enters and leaves the cell
  9. 14. the mass of solute in a given volume of solution, or mass/volume
  10. 16. layer of two membranes that surrounds the nucleus of an atom
  11. 19. double-layered sheet that forms the core of nearly all cell membranes
  12. 20. idea that all living things are composed of cells,cells are the basic units of structure and function in living things, and new cells are produced from existing cells
  13. 26. collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life
  14. 27. when comparing two solutions, the solution with the greater concentration of solutes