Across
- 1. a system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids
- 4. in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP
- 7. an organelle found in plant and algae cells where photosynthesis occurs
- 11. a membrane system found within chloroplasts that contains the components for photosynthesis
- 16. one of the small, tubular fibers composed of the protein tubulin that are found in the cytoplasm of eukaryotic cells, that compose the cytoskeleton, and that play a role in cell structure and movement
- 17. a hairlike structure arranged in tightly packed rows that projects from the surface of some cells
- 21. a long, hairlike structure that grows out of a cell and enables the cell to move
- 22. the cytoplasmic network of protein filaments that plays an essential role in cell movement, shape, and division
- 23. an atom's central region, which is made up of protons and neutrons
- 25. the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus
- 26. a rigid structure that surrounds the cell membrane and provides support to the cell
- 28. the part of the eukaryotic nucleus where ribosomal RNA is synthesized
- 29. a cell organelle composed of RNA and protein; the site of protein synthesis
- 30. a collection of tissues that carry out a specialized function of the body
- 31. an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; eukaryotes include protists, animals, plants, and fungi but not archaea or bacteria
- 32. a structure in the nucleus made of DNA and protein
Down
- 2. a double layer of phospholipids
- 3. The smallest unit that can carry on all of the processes of life
- 5. a fiber found inside eukaryotic cells that is composed mainly of the protein actin and that has a role in cell structure and movement
- 6. an organelle of plant cells that contains specific substances and performs specific functions for the cell
- 8. a single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria
- 9. a group of similar cells that perform a common function
- 10. the double membrane that surrounds the nucleus of a eukaryotic cell
- 12. a green pigment that is present in most plant and algae cells and some bacteria, that gives plants their characteristic green color, and that absorbs light to provide energy for photosynthesis
- 13. a cell organelle that helps make and package materials to be transported out of the cell
- 14. the soluble portion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membranes
- 15. a group of organs that complete related tasks
- 18. the cell's outer boundary
- 19. an organelle that is active during mitosis
- 20. a large cavity or sac that is found in plant cells or protozoans and that contains air or partially digested food
- 24. one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function
- 26. All living organisms are composed of one or more cells, cells are the basic units of structure and function in an organism and cells come only from the reproduction of existing cells
- 27. a cell organelle that contains digestive enzymes