1. Magnification Is the Enlargement of an Object
Chapter 7 Study Guide
1. Magnification is the enlargement of an object.
2. What is the function of carbohydrates that stick out from the outer surface of the plasma membrane? They help the cell
identify chemical signals
3. Bacteria are examples of prokaryotes.
4. Which diagram shows a cell in a hypotonic solution?
5. The structure most responsible for maintaining cell homeostasis is the plasma membrane
6. Which is present only in eukaryotic cells? Nucleus
7. Which type of cellular transport does not require an input of energy? facilitated diffusion
8. What feature of eukaryotic cells has enabled them to develop more specific functions than prokaryotic cells? organelles
9. Which is not a part of the cell theory?Cells are produced spontaneously as an organism grows.
10. At what point in the process of diffusion is dynamic equilibrium reached? when there is continuous movement but no change
11. Which component of the plasma membrane contributes to the fluidity of the plasma membrane? cholesterol molecules
12. What kind of an instrument is used to produce an enlarged image of a specimen? microscope
13. Which is not a factor that affects the rate of diffusion? conductivity
14. A plasma membrane is made up of a(n)phospholipid bilayer
15. A plant cell is placed in a hypotonic solution. What will happen to the plant cell? It will swell.
16. What part of the plasma membrane makes it difficult for water-soluble substances to move freely in and out of the cell? the nonpolar tails in the middle of the plasma membrane
17. Which type of transport requires energy input from the cell? active transport
18. Which statement is a fundamental principle of the cell theory? Living organisms are composed of cells.
19. All living things are made up of cells
20. What part of a cell do both prokaryotic cells and eukaryotic cells share? plasma membrane
21. Prokaryotes are organisms whose cells do NOT have (a) nucleus
22. Unlike animal cells, plant cells have cell walls
23. What is the magnification of a compound light microscope that uses a 10X lens in series with a 25X lens? 250X
24. The movement of particles from an area of higher concentration to an area of lower concentration is diffusion
25. The release of wastes or cell products from inside to outside a cell is exocytosis
26. Water moves into a cell (ex. egg in water) placed in a(n)hypotonic solution.
27. Water moves out of a cell (ex. egg in syrup) if the cell is placed in a (n) hypertonic solution.
28. What did scientists observe using the earliest microscopes. tiny organisms
29. The process used by the plasma membrane to control what enters and leaves the cell is called selective permeability
30. The fluid mosaic model presents the modern view of a plasma membrane
31. What types of materials are expelled (released) from cells during exocytosis? large molecules such as hormones
32. Which type of transport requires energy? active transport
33. If you wanted to see a three-dimensional image of DNA from a live specimen, which type of microscope would you use? scanning tunneling microscope
35. The diffusion of water molecules through a selectively permeable membrane is osmosis