Chapter 6: Tour of the Cell

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Across
  1. 4. Cellular extensions to which a cell uses to crawl along a surface.
  2. 6. Binds cells to the ECM by the ECM glycoproteins. Bind to cell-surface receptor proteins called integrins.
  3. 7. lamina A netlike array of protein filaments that maintains the shape of the nucleus by mechanically supporting the nuclear envelope.
  4. 9. The outer membrane is smooth, but the inner membrane is convoluted, with these infoldings.
  5. 11. cell A cell where the DNA is in an organelle called the nucleus, which is bound by a double membrane.
  6. 12. theory This theory states that an early ancestor of eukaryotic cells engulfed an oxygen-using non-photosynthetic prokaryotic cell.
  7. 13. Proteins with carbohydrates covalently bonded to them. Responsible for cell to cell recognition.
  8. 14. Function like rivets, fastening cells together into strong sheets.
  9. 15. Thin solid rods, that are built from molecules of actin.
  10. 17. Inside the chloroplast, another membranous system in the form of flattened, interconnected sacs.
  11. 18. fractionation Useful technique for studying cell structure and function. Takes cells apart and separates major organelles and other subcellular structures from one another.
Down
  1. 1. Most abundant glycoprotein in the ECM of most animal cells, which forms strong fibers outside the cells.
  2. 2. Sacs of membrane, that transfer membrane segments.
  3. 3. A process that Amoebas and many other unicellular eukaryotes eat by engulfing smaller organisms or food particles.
  4. 5. The complex of DNA and proteins making up chromosomes.
  5. 8. Within the centrosome is a pair of these, each composed of nine sets of triplet microtubules arranged in a ring.
  6. 10. streaming A circular flow of cytoplasm within cells, especially common in large plant cells, speeds the distribution of material within the cell.
  7. 12. matrix Composed of glycoproteins and the other carbohydrate-containing molecules secreted by the cells.
  8. 15. lamella A thin layer rich in sticky polysaccharides called pectins. Located between primary walls of adjacent cells.
  9. 16. proteins Responsible for transport of vesicles and movement of organelles with the cell. This requires energy, often provided by ATP hydrolysis.