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Name______________________________ Class __________________ Unit 3 Cells Date ______________ Unit Test B Multiple Choice Write the letter that best answers the question or completes the statement on the line provided. ____ 1. Which of the following contains a nucleus? a. mitochondria b. eukaryotes c. prokaryotes d. DNA ____ 2. The portion of the cell outside the nucleus is called the a. cell wall. b. cytoplasm. c. cell tissue. d. lipid bilayer. ____ 3. Which of the following is a function of the cell membrane? a. modifies, sorts, and packages proteins b. converts sunlight into chemical energy c. provides a place where the assembly of ribosomes begins d. regulates what enters and leaves the cell © Pearson Education, Inc. All rights reserved. ____ 4. Cell specialization is a process in which a. cells throughout an organism develop in different ways to perform different tasks. b. materials move through a cell membrane during exocytosis. c. biologists identify different levels of organization. d. water moves through a selectively permeable membrane. ____ 5. One of the principal compounds that cells use to store and release energy is a. CO2. b. O2. c. ATP. d. NADPH. ____ 6. What is the principal pigment of plants? a. carbon dioxide b. thylakoid c. chlorophyll d. adenosine triphosphate ____ 7. The Calvin cycle uses ATP and NADPH to produce a. high-energy sugars. b. the energy carriers ADP and NADP+. c. alcohol and lactic acid. d. the energy of sunlight. Unit 3 Test B 133 Name______________________________ Class __________________ Date ______________ ____ 8. The first set of reactions in cellular respiration is a. the Krebs cycle. b. electron transport. c. the Calvin cycle. d. glycolysis. ____ 9. What process releases energy from food molecules by producing ATP in the absence of oxygen? a. cellular respiration b. photosynthesis c. glycolysis d. fermentation ____10. The electron transport chain uses high-energy electrons from the Krebs cycle to a. break glucose in half. b. convert ADP into ATP. c. produce high-energy sugars. d. produce oxygen gas. ____11. Cellular respiration is to mitochondria as photosynthesis is to a. osmosis. b. microtubules. c. chloroplasts. d. ribosomes. ____12. As a cell grows larger, it has more trouble a. replicating its chromosomes. b. moving enough nutrients across the cell membrane. c. moving through the cell cycle. d. completing cell division. ____14. What is cytokinesis? a. the division of a cell’s cytoplasm b. a pigment in the chloroplast c. the final phase of interphase d. the spreading of cancer cells throughout the body 134 Unit 3 Test B © Pearson Education, Inc. All rights reserved. ____13. The process by which a cell divides into two daughter cells is called a. cellular respiration. b. cell cyclin. c. cell division. d. ratio of surface area to volume. Name______________________________ Class __________________ Date ______________ ____15. The proteins that regulate the timing of the cell cycle in eukaryotic cells are called a. cyclins. b. chromatids c. tumors. d. centrioles. Completion Complete each statement on the line provided. 16. The thin, flexible barrier around a cell is called the ___________________. 17. A group of similar cells that perform a particular function is called a(an) ___________________. 18. Plants take in the sun’s energy by absorbing ___________________. 19. Cellular respiration is called an aerobic process because it requires ___________________. 20. Each chromosome consists of two sister ___________________. Short Answer In complete sentences, write the answers to the questions on the lines provided. 21. What does the cell theory state? _________________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ 22. What is the difference between an autotroph and a heterotroph? © Pearson Education, Inc. All rights reserved. _________________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ 23. In words, write the overall equation for photosynthesis. _________________________________________________________________________________ _________________________________________________________________________________ 24. In words, write the overall equation for cellular respiration. _________________________________________________________________________________ _________________________________________________________________________________ 25. What are the phases of mitosis, in the order in which they occur? _________________________________________________________________________________ _________________________________________________________________________________ Unit 3 Test B 135 Name______________________________ Class __________________ Date ______________ Using Science Skills Use the drawings below to answer the following questions on the lines provided. C B J L P N M D A E F I H K Q G O Figure 7-1 Diagram I Diagram II 26. Comparing and Contrasting Look at Figure 1. Which structure letter in drawing II corresponds to structure A in drawing I? What is the name of this structure? _________________________________________________________________________________ _________________________________________________________________________________ 27. Comparing and Contrasting Look at Figure 1. Which structure letter in drawing I corresponds to structure M in drawing II? What is the name of this structure? _________________________________________________________________________________ _________________________________________________________________________________ 28. Interpreting Graphics Look at drawing II of Figure 1. What is the structure labeled J, and what is its function? _________________________________________________________________________________ 29. Comparing and Contrasting In drawing II, what is the structure labeled O? Why is there no corresponding structure in drawing I? _________________________________________________________________________________ _________________________________________________________________________________ 30. Interpreting Graphics Do the drawings in Figure 1 represent eukaryotes or prokaryotes? How can you tell? _________________________________________________________________________________ _________________________________________________________________________________ 136 Unit 3 Test B © Pearson Education, Inc. All rights reserved. _________________________________________________________________________________