Across
- 4. cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis
- 6. relatively constant internal physical and chemical conditions that organisms maintain
- 7. specialized structure that performs important cellular functions within a cell
- 8. the ________ reticulum is the internal membrane system in eukaryotic cells where lipid components of the cell membrane are assembled
- 11. the cell _____ is a strong, supporting layer around the cell membrane in some cells (plants and bacteria)
- 14. unicellular organism that lacks a nucleus
- 15. an organ _______ contains groups of organs that work together to perform a specific function
- 22. water channel protein in a cell
- 23. organism whose cell contains a nucleus
- 24. cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use
- 25. diffusion of water through a selectively permeable membrane
- 26. process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
- 28. the cell ______ says all living things are composed of cells, cells are basic units of structure and function, and new cells come from preexisting cells
- 29. group of similar cells that perform a particular function
- 30. the structure that contains the cell's genetic material in the form of DNA
- 31. cell organelle that stores materials such as water, salts, protein, and carbohydrates
Down
- 1. when comparing two solutions, the solution with the greater concentration of solutes
- 2. the _______ apparatus is the organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell
- 3. organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy
- 5. when the concentration of two solutions is the same
- 9. in eukaryotic cells, all cellular contents outside the nucleus; in prokaryotic cells, all of the cell's contents
- 10. cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell
- 12. type of pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
- 13. on or in a cell; a specific protein to whose shape fits a specific molecular messenger, such as a hormone
- 16. group of tissues that work together to perform closely related functions
- 17. when comparing two solutions, the solution with the lesser concentration of solutes
- 18. network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement
- 19. process of diffusion in which molecules pass across the membrane through cell membrane channels
- 20. bilayer that is a flexible, double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings
- 21. the cell ______ is a thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell
- 27. selectively ______ refers to a property of biological membranes that allows some substances to pass across it while others cannot
- 32. basic unit of all forms of life