Which of the following organisms do NOT have cell walls?

1. Which of the following organisms do NOT have cell walls? • plants • fungi • bacteria • animals

2. Which of the following is NOT true of plasma membranes? • Folded membranes increase surface area for efficiency. • Folded membranes do not form compartments in the cell. • Endoplasmic reticulum is made up of folded membranes. • Ribosomes are sometimes attached to folded membranes.

3. Folded membranes are an advantage to a cell because _____. • cell processes can be more efficient • the membranes provide a large surface area • the membranes form interconnected compartments • all of these

4. All living things are made up of _____. • cells • cork • wastes • cellulose

5. What do electron microscopes use to focus and magnify an image? • glass lenses • X rays • electron beams • light

6. Each of the following is a main idea of the cell theory except _____. • all organisms are composed of cells • the cell is the basic unit of organization of organisms • all cells are similar in structure and function • all cells come from preexisting cells

7. The scientist who first described living cells as seen through a simple microscope was _____. • van Leeuwenhoek • Schleiden • Hooke • Schwann

8. If a cell contains a nucleus, it must be a(n) _____. • plant cell • eukaryotic cell • animal cell • prokaryotic cell

9. A plasma membrane is made up of a(n) _____. • cholesterol layer • enzyme bilayer • phospholipid bilayer • protein layer

10. Which is not a way that Figure 7-2 is a model of cellular theory? • bricks are small units in a building • bricks are solid • there are many bricks in a building • bricks are organized to make a larger unit

11. What would happen to the structure in Figure 7-4 if part D is completely removed? • the ends would become tangled • it would disintegrate • it would have holes in it • it would collapse in on itself

12. Where are you least likely to find water in the structure shown in Figure 7-4 (hydrophobic) • A • B • C • E

13. Which structure in Figure 7-6 is the cell control center? • A • G • I • M

14. Which structure in Figure 7-6 maintains homeostasis? • B • D • H • L

15. Which structure in Figure 7-6 transforms energy? • C • G • J • K

16. Which structure in Figure 7-6 sorts and transports? • B • G • I • M

17. A cell contains the structure shown in Figure 7-7. What other cell structure that is not found in all eukaryotic cells is likely to be found in this cell? • mitochondria • ribosomes • cell wall • plasma membrane

18. One advantage of electron microscopes over light microscopes is their _____. • size • higher magnification • two-dimensional image • use of live specimens

19. Because the phospholipid molecules and some proteins are free to move, the plasma membrane is said to be a ____. • bilayer • solid • fluid mosaic • fatty acid

20. Cell structures that contain digestive enzymes are ____________________. • mitochondria • lysosomes • ribosomes • Golgi apparatus

21. In a cell, the sites of protein synthesis are the ____________________. • mitochondria • lysosomes • ribosomes • Golgi apparatus

22. The small, membrane-bound structures inside a cell are ____________________. • organs • nuclei • organelles • gross

23. The movement of materials into and out of the cells is controlled by the ____________________. • organelles • nucleus • brain • plasma membrane

24. An organism with a cell that lacks a true nucleus is a(n) ____________________. • paramecium • eukaryote • prokaryote • mitochondria

25. In a cell, the breakdown of molecules in order to release energy occurs in the ____________________, they are the “powerhouses” of the cell. • mitochondria • lysosomes • ribosomes • Golgi apparatus

26. Short, hairlike projections used for locomotion are ____________________. • really short legs • cilia • flagella • microtubules

27. In plants, the structures that transform light energy into chemical energy are called ____________________. • nucleus • nucleolus • endoplasmic reticulum • chloroplasts

28. The network of tiny rods and filaments that forms a framework for the cell is called the ____________________. • cilia • flagella • cytoskeleton • plasma membrane

29. The pigment that gives plants their green color is ____________________. • chlorophyll • green crayons • ink • lysosomes

30. The folded system of membranes that forms a network of interconnected compartments inside the cell is called the _________________________. • Golgi apparatus • mitochondria • endoplasmic reticulum • ribosomes

31. The functions of a eukaryotic cell are managed by the ____________________. • nucleus • nucleolus • mitochondria • endoplasmic reticulum

32. A structure outside the plasma membrane in some cells is the ____________________. • cytoskeleton • nucleus • cell membrane • cell wall