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Topic 2: Cells 1. The diagram below represents levels of organization in living things. 5. Which is the correct sequence of historical developments leading to our present knowledge of cells? (1) electron microscope cell theory compound light microscope (2) compound light microscope cell theory electron microscope (3) cell theory electron microscope compound light microscope (4) electron microscope compound light microscope cell theory 6. Which cellular organelle is represented by the diagram below? Which term would best represent X? (1) human (2) tissue (3) stomach (4) chloroplast 2. Which statement is not a part of the cell theory? (1) Cells are the basic unit of structure of living things. (2) Cells are the basic unit of function of living things. (1) cell wall (3) Cell parts such as chloroplasts are (2) molecules self-replicating. (4) Cells come from preexisting cells. 3. Which organism is considered an exception to the cell theory because it has a noncellular structure? (1) alga (2) bacterium (3) virus (4) moss (3) plasma membrane (4) protein 7. Which structures in the diagram below enable the observer to identify it as a plant cell? 4. The nucleus is to the cell as (1) the bones are to a human (2) the heart is to human (3) the muscles are to a human (1) A and B (2) B and C (4) the brain is to a human (3) A and C (4) B and D Page 1 Topic 2: Cells 8. Which cell structures are correctly paired with their functions? 13. The diagram below represents a cell. (1) The mitochondria produce enzymes, and ribosomes transport them. (2) The ribosomes make proteins, and the nucleus stores genetic information. (3) The cell membrane make enzymes, and cytoplasm transports them. (4) The vacuole stores genetic information, and chloroplasts make proteins. 9. In a multicellular organism, organs carry out a variety of life functions. In a single-celled organism, these functions are performed by (1) tissues (2) organelles (3) organ systems (4) organs 10. Which two cell structures work together in the process of protein synthesis? (1) nucleus and chloroplast (2) ribosome and vacuole (3) nucleus and ribosome (4) mitochondrion and cell membrane 11. Within which structure of an animal cell does DNA replication take place? (1) vacuole (2) cell membrane (3) nucleus (4) ribosome 12. The swordfish contains a heat generating organ that warms its brain and eyes up to 14°C above the surrounding ocean water temperature. Which structures are most likely to be found at relatively high concentrations within the cells of this heat generating organ? (1) nuclei (2) chloroplasts (3) chromosomes (4) mitochondria Which statement concerning ATP and activity within the cell is correct? (1) The absorption of ATP occurs at structure A. (2) The synthesis of ATP occurs within structure B. (3) ATP is produced most efficiently by structure C. (4) The template for ATP is found in structure D. 14. Hereditary information is stored inside the (1) ribosomes, which have chromosomes that contain many genes (2) ribosomes, which have genes that contain many chromosomes (3) nucleus, which has chromosomes that contain many genes (4) nucleus, which has genes that contain many chromosomes Page 2 Topic 2: Cells 15. The diagram below represents two single-celled organisms. 17. Which statement best describes the diagram? (1) Nerve cell X is releasing receptor molecules. (2) Nerve cell Y is signaling nerve cell X. (3) Nerve cell X is attaching to nerve cell Y. (4) Nerve cell Y contains receptor molecules for substance A. 18. A drug is developed that, due to its molecular shape, blocks the action of substance A. Which shape would the drug molecule most likely resemble? These organisms carry out the activities needed to maintain homeostasis by using specialized internal (1) tissues (2) organelles (3) systems (4) organs (1) (2) (3) (4) Base your answers to questions 19 and 20 on the diagrams below which represent two different cells. Base your answers to questions 16 through 18 on the diagram below and on your knowledge of biology. 19. In both cells, the organelles labeled E are the sites of 16. The process represented in the diagram best illustrates (1) secretion (2) starch synthesis (1) cellular communication (3) aerobic respiration (2) muscle contraction (4) food storage (3) extraction of energy from nutrients (4) waste disposal 20. Cell II most likely represents a plant cell due to the presence of (1) A (2) B (3) E (4) F Page 3 Answer Key LE BE-Topic 2 1. 2 2. 3 3. 3 4. 4 5. 2 6. 3 7. 2 8. 2 9. 2 10. 3 11. 3 12. 4 13. 3 14. 3 15. 2 16. 1 17. 4 18. 2 19. 3 20. 4 Page 4