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Across 2. Contains most of the genes in a eukaryotic cell 7. – a large protein composed of several polypeptides 8. pump excess water out of a cell. "_________ vacuoles" 9. Used to study the internal ultrastructure of cells "_________ electron microscope" 10. A membranous sac of hydrolytic enzymes that an animal uses to digest all kinds of macromolecules 15. Area of a prokaryotic cell where the DNA is concentrated 16. – locomotor appendages that protrude from some cells. "_____ and ______" (two words) 18. An extensive network of membranes that accounts for more than half the total membrane in many eukaryotic cells "_______ reticulum" 20. The thinnest of the three fibers that make up the cytoskeleton 23. a microbody containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading to hydrogen peroxide 25. Proteins that have carbohydrates covalently bonded to them 27. proteins that interact with the cytoskeleton for cell motility. "___________ proteins" 28. Eating by engulfing smaller organisms or food particles 29. Anchors the flagellum or cilium to the cell. Structurally identical to a centriole. (two words) 30. especially useful for detailed study of the surface of a specimen. "_________ _________ microscope" (two words) 32. Encloses the nucleus, separating its contents from the cytoplasm. "Nuclear _________" 33. families of closely related plant organelles that include chloroplasts, chromoplasts, and amyloplasts 35. Outer surface lacks ribosomes. "______ ER" 38. A network of fibers extending throughout the cytoplasm 39. The infoldings of the inner membrane of the mitochondria 44. DNA concentrated in a region called the nucleoid, but no membrane separates this region from the rest of the cell. "___________ cell" 46. A stack of thylakoids 47. A prominent structure within the nondividing nucleus where ribosomal RNA is synthesized 48. A measure of the clarity of the image 49. The sites of cellular respiration 50. Flattened, inter-connected sacs inside the chloroplast 51. Composed of nine sets of triplet microtubules arranged in a ring. Pairs of centrioles are within the centrosome of an animal cell (s)

Down 1. A sac made out of membrane inside of cells 3. A large vacuole in many plants enclosed by a membrane called the tonoplast. "_______ vacuole" 4. Semifluid substance within the plasma membrane, in which organelles are found 5. The sites of photosynthesis; found only in plants and algae 6. can spin as fast as 130,000 revolutions per minute and apply forces on particles of more than 1 million times the force of gravity (s) 11. The ratio of an objects image size to its real size 12. Take cells apart and separate the major organelles from one another. "Cell ______" 13. At the boundary of every cell; Functions as a selective barrier that allows sufficient passage of oxygen, nutrients, and wastes to service the entire volume of the cell (two words) 14. The center of manufacturing, warehousing, sorting, and shipping in a cell (two words) 17. A netlike array of protein filaments that maintains the shape of the nucleus by mechanically supporting the nuclear envelope "nuclear _________" 19. A region often located near the nucleus that is considered to be a “microtubule-organizing center” 20. The thickest of the three fibers that make up the cytoskeleton 21. The entire region between the nucleus and the plasma membrane in a eukaryotic cell. Term is also used for the interior of a prokaryotic cell 22. subcellular structures 24. The compartment of the mitochondria enclosed by the inner membrane; contains many different enzymes as well as the mitochondrial DNA and ribosomes. "_______________ matrix" 26. The in-between or middle-range sized of the three fibers that make up the cytoskeleton. "___________ filaments" 31. Formed by phagocytosis and fuses to a lysosome. "______ vacuoles" 34. Visible light is passed through the specimen and then through the glass lenses. The lenses refract the light in such a waythat the image of the specimen is magnified when projected. "_____ microscope" 36. The fluid outside the thylakoids, which contains the chloroplast DNA, and ribosomes as well as many enzymes 37. Made up of different parts of the eukaryotic cell, and carries out a variety of tasks in the cell. "________________ system" 38. The discrete units of DNA that carry the genetic information; located inside the nucleus 40. Has a true nucleus, bounded by a membranous nuclear envelope. "__________ cell" 41. Vesicles in transit from one part of the cell to another. "_________ vesicles" 42. focuses a beam of electrons through the specimen or onto its surface. "_____________ microscope" 43. A complex of protein and DNA that makes up chromosomes 45. Has ribosomes that stud the outer surface. "_____ ER"