Cells

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Across
  1. 3. A cellular structure composed of RNA and proteins that is the site of protein synthesis in eukaryotic and prokaryotic cells.
  2. 5. A single-celled organism that lacks a membrane-bound nucleus and specialized organelles.
  3. 6. Made up of a single cell.
  4. 7. Apparatus An organelle found in eukaryotic cells responsible for the final stages of processing proteins for release by the cell.
  5. 8. A theorized process in which early eukaryotic cells were formed from simpler prokaryotes.
  6. 10. A type of organism composed of one or more cells containing a membrane-bound nucleus, specialized organelles in the cytoplasm, and a mitotic nuclear division cycle.
  7. 11. Membranous cavity, usually filled with fluid.
  8. 12. Membrane A thin, phospholipid and protein molecule bilayer that encapsulates a cell and controls the movement of materials in and out of the cell through active or passive transport.
  9. 14. Wall Protective barrier outside the plasma membrane of plant and certain other cells.
  10. 15. An organelle found in plant cells and the cells of other eukaryotic photosynthetic organisms where photosynthesis occurs.
  11. 17. Circular DNA molecules that are separate from chromosomal DNA and can replicate independently.
Down
  1. 1. A subunit within a cell that has a specialized function.
  2. 2. A membrane-bound organelle found in most eukaryotic cells; site of cellular respiration.
  3. 4. Made up of more than one cell.
  4. 9. A membrane-bound organelle in eukaryotic cells functioning to maintain the integrity of the genetic material and, through the expression of that material, controlling and regulating cellular activities.
  5. 10. Reticulum (ER) An organelle, containing folded membranes and sacs, responsible for the production, processing, and transportation of materials for use inside and outside a eukaryotic cell. There are two forms of this organelle: rough ER that has surface ribosomes and participates in the synthesis of proteins mostly destined for export by the cell and smooth ER that has no ribosomes and participates in the synthesis of lipids and steroids as well as the transport of synthesized macromolecules.
  6. 13. The basic unit of structure and function for all living organisms. Cells have three common components: genetic material, cytoplasm, and a cell membrane. Eukaryotic cells also contain specialized organelles.
  7. 16. A group of membrane-bound organelles commonly found in photosynthetic organisms and mainly responsible for the synthesis and storage of food.