1			2				3
						4															5
	6																						7
	8	9																							10
																												11
12
13
													14
				15			16
																				17
											18							19
20
												21
					22
					23				24
														25
					26
														27
		28
																29

Across 2. are macromolecular machines, found within all cells, that perform biological protein synthesis. 4. is, in essence, the transportation system of the eukaryotic cell, and has many other important functions such as protein folding. (2 Words) 6. describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. (3 Words) 7. The cilium, plural cilia, is a membrane-bound organelle found on most types of eukaryotic cell, and certain microorganisms known as ciliates. Cilia are absent in bacteria and archaea. 8. a two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward. (2 Words) 12. is a single-celled organism that lacks a nucleus and other membrane-bound organelles. (2 Words) 13. a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division. 14. Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration. 15. a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products 18. can be defined as the state of a given system in which the reversible reaction taking place in it stops changing the ratio of reactants and products, but there is a movement of substances between the reactants and the products. (2 Words) 20. a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. (2 Words) 22. A flagellum is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates 24. A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. (2 Words) 25. also known as the Golgi complex, Golgi body, or simply the Golgi, is an organelle found in most eukaryotic cells. (2 Words) 26. A small structure in a cell that is surrounded by a membrane and has a specific function. 27. is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate, which is used throughout the cell as a source of chemical energy. 28. the net movement of water across a semipermeable membrane 29. plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process.

Down 1. molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. (2 Words) 3. its ability to differentiate between different types of molecules, only allowing some molecules through while blocking others. (2 Words) 5. The large network consisting of protein fibers and other molecules that gives shape and structure to cells in the body 9. any external solution that has a low solute concentration and high water concentration compared to body fluids (2 Words) 10. membrane proteins that aid in the facilitated diffusion or active transport of ions across the hydrophobic lipid bilayer. (2 Words) 11. is a biological membrane that separates and protects the interior of all cells from the outside environment (2 Words) 13. Cell biology is a branch of biology that studies the structure, function, and behavior of cells. All living organisms are made of cells. 16. The fluid inside a cell but outside the cell's nucleus. Most chemical reactions in a cell take place in the cytoplasm. 17. the central and most important part of an object, movement, or group, forming the basis for its activity and growth. 19. whose members are known as eukaryotes, is a diverse domain of organisms whose cells have a nucleus. (2 Words) 21. a small dense spherical structure in the nucleus of a cell during interphase. 23. membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers—proteins, nucleic acids, carbohydrates, and lipids.