1. Starters

2. 1.Which cell organelle is correctly paired with its function? A. vacuole—protein synthesis B. mitochondrion—photosynthesis C. chloroplast—cellular respiration D. nucleus—directs cellular activities

3. 2.The plasma membrane of prokaryotic and eukaryotic cells consists mainly of which organic compounds? A. saccharides and carbohydrates B. proteins and saccharides C. lipids and carbohydrates D. lipids and proteins

4. 3.Why are contractile vacuoles important to unicellular organisms like paramecia? A. They excrete wastes. B. They help the cell move. C. They maintain homeostasis. D. They respond to external stimuli.

5. 4.Cell membranes allow some molecules to move freely across the membrane, while other molecules are restricted. Which term best describes this capability of a cell membrane? A. semipermeable B. impervious C. resilient D. unyielding

6. 5.All of the following are functions of a cell membrane except A. surrounding and protecting the contents of the cell. B. releasing waste products from the cell. C. producing energy for cell processes. D. allowing gases to enter the cell.

7. 6.Which could be used to represent the plasma membrane’s job? A. a farmer growing crops B. a high school principal running a school C. a nuclear power plant producing energy D. a gatekeeper allowing cars in and out of a parking lot

8. 7.A muscle cell absorbs the water it needs without using energy. Which process does the cell use to take in water? A. osmosis B. exocytosis C. phagocytosis D. active transport

9. 8.Phototaxis is movement in response to which stimulus? A. light B. sugar C. chemicals D. nutrients

10. 9.What is the function of an eyespot? A. camouflage B. trapping food C. detecting light D. photosynthesis

11. 10.Which is a result of mitosis? A. four sex cells B. four haploid cells C. two diploid daughter cells D. two haploid daughter cells

12. 11.A cell is placed in a highly concentrated salt solution. What will most likely happen to the cell if left in the solution? A. The cell will shrink in size, losing water due to osmosis. B. The cell will grow in size, gaining water due to osmosis. C. The cell will grow in size, gaining some salt due to osmosis. D. The cell will shrink in size, losing some of its salts due to osmosis.

13. 12.What is the longest stage of the cell cycle? A. meiosis B. mitosis C. interphase D. cytokinesis

14. 13.Which places the stages of the cell cycle in order from beginning to the end? A. cytokinesis, telophase, metaphase, anaphase, prophase, interphase B. interphase, prophase, metaphase, anaphase, telophase, cytokinesis C. prophase, interphase, anaphase, metaphase, cytokinesis, telophase D. telophase, metaphase, cytokinesis, anaphase, prophase, interphase

15. 15. What process involves the division of the cytoplasm? A. anaphase B. cytokinesis C. interphase D. prophase