Across
- 1. slender threadlike structure, especially a microscopic whiplike appendage that enables many protozoa, bacteria, spermatozoa, etc., to swim.
- 3. a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence
- 5. rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose.
- 7. (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.
- 8. a microscopic membrane of lipids and proteins that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm.
- 9. small dense spherical structure in the nucleus of a cell during interphase.
- 11. organelle found in eukaryotic cells. thick protuberances that project from the much larger cell body
- 14. a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface or studded ribosomes Involved in the transport of materials.
- 15. organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane.
centrioles minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division
- 18. any of a number of organized or specialized structures within a living cell.
- 19. scientific theory which describes the properties of cells.
Down
- 2. of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
- 4. an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).
- 6. cells which do not have a cell nucleus, and lack other things eukaryotes
- 10. the material or protoplasm within a living cell, excluding the nucleus.
- 11. a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
- 12. cells contain a nucleus surrounded by a membrane and whose DNA is bound together by proteins (histones) into chromosomes.
- 13. present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material.
- 16. minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins
- 17. space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid.