5.2 - AN OVERVIEW OF CELL

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Across
  1. 6. In both prokaryotic and eukaryotic cells, a semi-fluid matrix called ......... occupies the volume of the cell.
  2. 7. The ........... cells lack such membrane bound organelles.
  3. 9. Animal cells contain another non-membrane bound organelle called .......... which helps in cell division.
  4. 13. This nucleus contains the ........... which in turn contain the genetic material, DNA.
  5. 17. The largest isolated single cell is the egg of an ..........
  6. 18. The onion cell which is a typical ..........., has a distinct cell wall as its outer boundary and just within it is the ..............
  7. 20. Various chemical reactions occur in it to keep the cell in the ‘............state’.
  8. 21. ......... are non-membrane bound organelles found in all cells – both eukaryotic as well as prokaryotic.
Down
  1. 1. The shape of the cell may vary with the ......... they perform.
  2. 2. Within the cell, ribosomes are found not only in the cytoplasm but also within the two organelles – ............ (in plants) and .......... and on rough ER.
  3. 3. Besides the nucleus, the eukaryotic cells have other membrane bound distinct structures called ........... like the endoplasmic reticulum (ER), the golgi complex, lysosomes, mitochondria, microbodies and vacuoles.
  4. 4. Cells that have membrane bound nuclei are called .......... whereas cells that lack a membrane bound nucleus are prokaryotic.
  5. 5. Among multicellular organisms, .........cells are about 7.0 µm in diameter.
  6. 8. The cells of the human cheek have an outer membrane as the ............ structure of the cell.
  7. 10. Cells also vary greatly in their ...........
  8. 11. They may be disc-like, polygonal, columnar, cuboid, thread like, or even ...........
  9. 12. The cytoplasm is the main area of .............activities in both the plant and animal cells.
  10. 14. Cells ....... greatly in size, shape and activities.
  11. 15. ......... are some of the longest cells.
  12. 16. Inside each cell is a dense membrane bound structure called ...........
  13. 19. For example, ............, the smallest cells, are only 0.3 µm in length while bacteria could be 3 to 5 µm.