Across
- 4. small, membrane-enclosed organelles that contain enzymes involved in a variety of metabolic reactions, including several aspects of energy metabolism
- 6. the material of which the chromosomes of organisms other than bacteria (i.e., eukaryotes) are composed. It consists of protein, RNA, and DNA
- 7. a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence
- 8. wall, surrounds the plasma membrane of plant cells
- 9. reticulum, a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis
- 10. a membrane-bound cell organelle that contains digestive enzymes
- 13. occurring in pairs and involved in the development of spindle fibers in cell division
- 15. endoplasmic reticulum, synthesizes lipids, phospholipids as in plasma membranes, and steroids
- 17. the gelatinous liquid that fills the inside of cell
- 19. a 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
- 21. a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid
- 22. Endoplasmic, produce proteins for the rest of the cell to function
Down
- 1. a microscopic double layer of lipids and proteins that bounds cells and organelles and forms structures within cells
- 2. apparatus, a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport
- 3. help transport materials that an organism needs to survive and recycle waste materials
- 4. increase the surface area of the cell exposed to the lumen to enhance absorption and secretion
- 5. a plastid that contains chlorophyll and in which photosynthesis takes place
- 11. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass
- 12. 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
- 14. a slender threadlike structure, especially a microscopic appendage that enables many protozoa, bacteria, spermatozoa
- 16. any of several organized or specialized structures within a living cell
- 17. a short eyelash-like filament that is numerous on tissue cells of most animals and provides the means for locomotion of protozoans of the phylum Ciliophora
- 18. The aqueous solution of a cell's cytoplasm consists of water, organic molecules, and inorganic ions
- 20. membrane, a double layer that encloses the cell's nucleus, where the chromosomes reside