Across
- 2. 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.
- 4. system- An organ system is a group of organs that work together as a biological system to perform one or more functions.
- 9. the soluble portion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membranes
- 11. In biology, the smallest unit that can perform all life processes; cells are covered by a membrane and contain DNA and cytoplasm
- 12. theory- the theory that states that all living things are made up of cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells
- 13. a group of similar cells that perform a common function
- 14. a long, hairlike structure that grows out of a cell and enables the cell to move
- 16. membrane- or cell membrane, the cell's outer boundary
- 18. vacuole- a large cavity or sac that is found in plant cells or protozoans and that contains air or partially digested food
- 22. one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function
- 26. 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
- 29. an organelle that is active during mitosis
- 30. a cell organelle that contains digestive enzymes
- 31. apparatus- a cell organelle that helps make and package materials to be transported out of the cell
- 32. Bilayer- a double layer of phospholipids that makes up plasma and organelle membranes
Down
- 1. 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
- 3. a fiber found inside eukaryotic cells that is composed mainly of the protein actin and that has a role in cell structure and movement
- 5. a single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria
- 6. the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus
- 7. an organelle of plant cells that contains specific substances and performs specific functions for the cell
- 8. envelope- is made up of two lipid bilayer membranes which in eukaryotic cells surrounds the nucleus
- 10. a small dense spherical structure in the nucleus of a cell during interphase.
- 15. in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP
- 17. a collection of tissues that carry out a specialized function of the body
- 19. a membrane system found within chloroplasts that contains the components for photosynthesis
- 20. a hairlike structure arranged in tightly packed rows that projects from the surface of some cells
- 21. 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
- 23. in physical science, an atom's central region, which is made up of protons and neutrons
- 24. 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
- 25. an organelle found in plant and algae cells where photosynthesis occurs
- 26. in a eukaryotic cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryotic cell, the main ring of DNA
- 27. the cytoplasmic network of protein filaments that plays an essential role in cell movement, shape, and division
- 28. wall- a rigid structure that surrounds the cell membrane and provides support to the cell