Name:_______________________________ Date:__________________ Class Period:___________ ANSWER KEY (80pts total point break down on student copy) Test 3- Cell Structure and Function You have the entire class period to finish this test. Use your time wisely. Carefully read the directions and question before answering. Prior to turning in your test, please spend a few moments to check over your answers. As always, cheating is an automatic 0 for this test. Multiple Choice: Please circle the best answer. Each question is worth 2 points. 1. _________ are comprised of more than one cell. (Answer: D, Knowledge, Objective: 22) a. Eukaryotes b. Prokaryotes c. Protazoa d. Multicellular organisms e. Unicellular organisms 2. Organelles are ____________ that are found in _________ cells. (Answer: E, Knowledge, Objective: 5) a. proteins, prokaryotic b. nutrients, somatic c. microtubules, dividing d. “little organs”, prokaryotic e. “little organs”, eukaryotic 3. The purpose of the cytoskeleton is to do what? (Answer: A, Knowledge, Objective: 9) a. Maintain cell shape and aid in movement. b. Aid in cellular movement and respiration. c. Produce proteins and act as gate for the cell. d. Make food and help the cell divide. e. Keep the cell safe and maintain cell shape. 4. Which of the following is found only in plant cells? ( Answer: C, Understanding, Objective: 8) a. Golgi apparatus b. Lysosome c. Chloroplast d. Nucleus e. Centriole 5. The plasma membrane serves as…(Answer: A, Knowledge, Objective: 12) a. a supportive and selective barrier. Name:_______________________________ Date:__________________ Class Period:___________ b. the site of protein synthesis. c. the command center of the cell. d. a place for food product in eukaryotic cells. e. a protein modification site. 6. Selectively permeable can be used to describe a membrane that…(Answer: B. Knowledge, 13) a. is found between two solutions. b. blocks certain things from entering or leaving the cell. c. blocks everything from entering or leaving the cell. d. only allows things to enter a cell. e. only allows nothing to enter or leave the cell. 7. ____________ microscopes use a beam of electrons to produce a 3D image of a specimen that has not been thinly sliced. (Answer E, Knowledge, 1) a. Light b. Confocal c. Transmission Electron d. Scanning Probe e. Scanning Electron 8. If you add 5g of salt to a flask 1000ml of water, what is the concentration of glucose? (Answer B, Application, 16) a. 1L/5g b. 5g/1L c. 5000mg/1000ml d. 1g/1L e. 5mg/1L 9. Ribosome is to protein as chloroplast is to _____________.(Answer A, Understanding, 6) a. Chemical Energy. b. Sunlight. c. Usable energy. d. Cellulose. e. DNA. 10. All prokaryotes and all eukaryotes both have... (Answer E, Knowledge, 4) a. Nucleus b. Organelles c. Cell walls d. Chloroplasts e. Plasma membranes Name:_______________________________ Date:__________________ Class Period:___________ 11. Which of the following organisms is an example of a prokaryote? (Answer D, Knowledge, 4) a. Tiger b. Maple tree c. Shitake mushroom d. Strep bacterium e. Amoeba 12. Active transport requires...(Answer C, Knowledge, 22) a. Glucose b. Sunlight c. Energy d. Protein e. Food 13. Select the correct order of organization in multicellular organisms. (Least complex to most complex) (Answer C, Knowledge, 25) a. Cells -> Organelles -> Organs -> Tissue -> Organ Systems b. Organs Systems -> Organs -> Tissue -> Cells c. Cells -> Tissue -> Organs -> Organ Systems d. Tissue -> Organelles -> Organs -> Organ Systems e. Cells -> Tissue -> Organelles -> Organs -> Organ Systems 14. Cell walls are not found in which of the following organisms? (Answer B, Knowledge, 15) a. Bacteria b. Animals c. Plants d. Fungi e. Archaea 15. Molecular transports involve… (Answer D, Knowledge, 21) a. the diffusion of water through the plasma membrane. b. passive transport to bring in small molecules c. pumps that work with the concentration gradient. d. pumps that change shape to bring in small molecules. e. a form of facilitated diffusion. 16. Passive transport includes… (Answer E, Knowledge, 18) a. exocytosis, facilitated diffusion, and osmosis. b. pinocytosis, facilitated diffusion, molecular transports. c. facilitated diffusion, diffusion, phagocytosis. d. diffusion, molecular transports, osmosis e. diffusion, facilitated diffusion, osmosis. Name:_______________________________ Date:__________________ Class Period:___________ 17. Exocytosis is… (Answer D, Knowledge, 21) a. the movement of particles from high concentration to low concentration. b. when external concentrations reach equilibrium. c. the way that water enters or leaves the cell d. active transport that involves content leaving the cell. e. active transport that involves contents entering the cell. 18. Equilibrium is when the… (Answer A, Knowledge, 18) a. solute concentration is the same throughout the system. b. solution concentration is the same throughout the system. c. particles stop moving in or out. d. concentration is greater inside than outside. e. concentration is greater outside than inside. Matching: 19. Use the terms from the box below to complete the following table. Some terms maybe not be used and others maybe used more than once. (Knowledge, Objective: 10) Support Keratin Tubulin Centrioles Actin Cytoskeleton Cytoplasmic movement Flagella and cilia Cell adhesion Flexible framework Nuclear envelope Microfilaments Microtubules Intermediate Filaments Answers: Microfilaments- support, cytoskeleton, cytoplasmic movement, actin, flexible framework Microtubules- support, cytoskeleton, flagella and cilia, tubulin, centrioles Intermediate filament- nuclear envelop, cell adhesion, cytokeleton, keratin, support Name:_______________________________ Date:__________________ Class Period:___________ Short Answer: Using more than a few words but no more than four sentences answer the following questions. 20. What are the three points of the cell theory? (Knowledge, Objective: 3) 1. All living things are composed of cells. 2. Cells are the basic units of structure and function in living things. 3. New cells are produced from existing cells. 21. What is cell specialization? Give an example and describe why specialization is important. (Understanding, Objective: 25) Cell specialization is when a cell performs a particular role in multicellular organisms. Some examples of specialized cells are blood cells, plant guard cells, stomata, pancreatic cells, and muscle cells. Specialization cells to perform one task and be efficient at this task instead of having each cell do all tasks. 22. Make a sketch of a plasma membrane lipid bilayer and label it. (Application/knowledge, Objective: 11) 23. How does phagocytosis compare with pinocytosis and how are they different? (Analysis. 22) Phagocyctosis and pinocytosis are they are forms of active transport. Phagocytosis, a form of endocytosis, involves the movement of the cytoplasm around a particle to engulf it. Pinocytosis is on a smaller scale and is the uptake of liquids Name:_______________________________ Date:__________________ Class Period:___________ into the cell. Pinocyctosis is more like cell drinking and phagocytosis is more like cell eating. 24. How are advances in microscopes important to biology. (Application, 2) Microscopes allow us to see things as small as an atom. This is important to biology, because most life is microscopic. Biologist can now see cells, proteins, and atoms to better understand how our bodies and other organisms work. 25. Write a one-sentence description for each organelles listed. (Application, Objective: 6) Endoplasmic reticulum- The endoplasmic reticulum is the site where lipid components of the cell membrane are assembled, along with proteins and other materials that are exported from the cell. Nucleus- The nucleus contains nearly all the cell’s DNA and with it the coded instructions for making proteins and other important molecules. Ribosome- Ribosomes are located on rough ER, make proteins, and are comprised of protein and RNA Golgi apparatus- The Golgi apparatus packages, modifies, and sorts proteins and other materials from the endoplasmic reticulum for storage in the cell or secretion. Lysosome- Lysosomes are sacks filled with enzymes that break down waste products as well as lipids, proteins, and carbohydrates Vacuole- Vacuoles store materials like water, proteins, and carbohydrates. Mitochondrio- Mitochondria break down “food” and turn it into usable energy Chloroplast- Chloroplasts are found only in photosynthetic organisms like plants, are believed to have once been an endosymbiotic bacterium, and convert sunlight and other materials into food. Name:_______________________________ Date:__________________ Class Period:___________ Centriole- Centrioles are not found in plant cells and aid in cell division by producing spindle fibers. Essay: Use complete sentences to answer the following questions in 1-2 paragraphs. 26. Using the terms isotonic, hypotonic, hypertonic, osmotic pressure, design an experiment to illustrate osmosis. Draw pictures if necessary. (Synthesis, 16) I would use three beakers. The first beaker would contain 10% salt water. This would be a hypertonic solution. The second beaker would contain dH2O. This is my hypotonic solution. The third bigger will contain a solution similar to the inside of a plant cell. This would be an isotonic solution. I would place potato slice into each of the three beakers and record the results. Osmotic pressure will cause the potato slice to expand in the hypotonic solution. The potato slice will shrink in the hypertonic solution because it will lose water do to osmosis and the potato in the isotonic solution will remain the same. The change in the potato shows that there has been a loss or gain of water. 27. Your lab assistant has just discovered a new organelle that she thinks it originated by the same means as chloroplasts and mitochondria. She describes the new organelle has having a double membrane and a circular chromosome. What is your lab assistant claiming about the evolution of the organelle? Do you agree? Explain your reasoning. (Evaluation, 7) She is suggesting that the organelle’s ancestors were bacteria that found living inside another cell to be beneficial. This is the endosymbiotic theory. I would have to agree, because bacteria contain circular chromosomes and all cells have a double membrane. Both of these qualities can be found in this new organelle.
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