Welcome to the Chapter 7 Test!

Please set up your answer sheet like this: Name #1 Name #2 Date, Period Chapter 7 Test

Instructions: The test is in the same style as a visual quiz. However, you get to work at your own pace. You can discuss each answer with your table partner. Together, you will turn in one set of answers. Discuss each answer before writing! During the discussion, decide which concepts from the notes to include in your answer. Remember to underline each concept. If you can’t whisper, you will work alone.

Good luck, and remember to whisper when discussing your answers!

Cell A Cell B 1. For the diagram below: a. Identify the types of cells shown below b. List 3 ways that cells A and B are different Cell A Cell B

2. Explain why both cells contain DNA and ribosomes. Cell A Cell B

3. Explain why the organelles of a eukaryotic cell are membrane-bound.

4. “Extremophile” bacteria are prokaryotes that live in extreme environments, such as volcanic vents. Explain why these bacteria can survive where most eukaryotes cannot.

Prokaryotes and Eukaryotes 5. In the cells below, no nucleus is visible. List two other pieces of evidence to support the fact that these are eukaryotic cells. BOTH prokaryotes and eukaryotes: are surrounded by a lipid cell membrane Contain DNA Make and secrete protein Prokaryotes and Eukaryotes Before we talk about how prokaryotes and eukaryotes are different, let’s talk about how they’re similar. ALL cells are enclosed within a membrane. What is a membrane? The thin outer covering that keeps something liquidy together, like this water balloon. And ALL cells contain DNA at some point during their lives.

6. Identify the cell below as animal, plant, fungus, protist, or bacteria, and defend your answer.

7. For the diagram below: a. Identify the circled organelle b. Describe this organelle’s function

8. Explain how the circled organelle knows how to do its job.

9. Identify organelle B, and defend your answer. C D

10. Identify organelle D, and describe its function.

11. Below is a micrograph of a heart muscle cell 11. Below is a micrograph of a heart muscle cell. Explain why this cell contains an abundance of mitochondria.

12. When you eat bread, your cells transform the starch into energy 12. When you eat bread, your cells transform the starch into energy. Identify the organelles involved, and the processes they perform.

13. Plant cells contain chloroplasts and are able to perform photosynthesis. Explain why plants still need mitochondria.

14. Explain why plants wilt when they are not watered.

15. Identify the organelle circled below, and describe its function in unicellular protists.

16. The liver is an organ that helps the body get rid of toxins 16. The liver is an organ that helps the body get rid of toxins. Identify an organelle that is abundant in liver cells, and defend your answer.

17. Explain why ALL cells – even bacteria – are surrounded by cell membranes.

18. Describe the structure of the cell membrane.

19. For the diagram below: a. Identify structures A and B b. Explain why A is not as flexible as B A B

20. Explain why structure A, despite its strength, is unable to control what enters/leaves the cell.

21. Identify the substance labeled “extracellular fluid” in the diagram, and explain how it is different from pure water.

The diagram below shows the concentrations of a dissolved solute, carbon dioxide gas (CO2), inside and outside of a cell. = CO2

22. State whether the cell will use simple diffusion, facilitated diffusion, or active transport to move CO2 into the cytoplasm, and defend your answer with TWO reasons. = CO2

23. Predict whether or not the cell will have to use energy to transport CO2 into the cytoplasm, and defend your answer. = CO2

24. Explain why this cell – and all cells – must transport solutes across their cell membranes. = CO2