Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The time This test does not allow backtracking. Changes to the answer after submission are Your answers are saved automatically. Remaining Time: 12 minutes, 44 seconds. Question Completion Status: ??Moving to the next question prevents changes to this answer. Question 16 These are sometimes attached to the endoplasmic reticulum. A. Golgi bodies B. ribosomes C. mitochondria D. lysosomes ? Moving to the next question prevents changes to this answer.
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Proteins and fats are important for the cell. Which organelle below does NOT play a role in the production of one or more of these important substances? rough endoplasmic reticulum mitochondria
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True or false: If false, make it a correct statement: The smooth endoplasmic reticulum contains many enzymes that allow it to perform functions like detoxifying circulating drugs. Use Figures 4.14 (page 65 of your textbook) and 4.17 (page 67 of your textbook) to answer the following question: Place the following steps in the order in which they occur: A) Proteins are modified as they pass through the Golgi apparatus B) A vesicle from the rough ER fuses with the Golgi membrane C) A vesicle buds off from the Golgi stack D) A vesicle containing secretory protein fuses with the cell's plasma membrane How are lysosomes different from vacuoles? 5) Chloroplasts and Mitochondria: Providing Cellular Energy Complete the following questions as you read the fourth chapter content "Chloroplasts and Mitochondria: Providing Cellular Energy" True or false: An animal cell will contain chloroplasts and mitochondria. If false, correct the statement: The process of photosynthesis occurs primarily in a plant's leaves. Based on this information, which of the following organelles would you expect to be present in the cells of plant leaves? A) Ribosomes B) Chloroplasts C) The nucleus D) Mitochondria
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Q.24. Which of the following are found in plants? a. plasmodesmata c. gap junctions b. tight junctions d. anchoring junctions 0.25. A series of enzymes catalyze the reaction X - Y → Z - A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. What is substance X? A) an allosteric inhibitor B) a coenzyme C) a substrate D) the product Q.26. Yeast cells that have defective mitochondria incapable of respiration will be able to grow by catabolizing which of the following carbon sources for energy? A) fatty acids B) Such yeast cells will not be capable of catabolizing any food molecules and will therefore die. C) proteins D) glucose Q.27. Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. Which of the following hypotheses is most plausible in light of such structural similarities? A) Motor proteins such as dynein must have evolved before any of these four kinds of structure. B) Cilia and flagella coevolved in the same ancestral eukaryotic organism. C) Natural selection for cell motility repeatedly selected for microtubular arrays in circular patterns in the evolution of each of these structures. D) Loss of basal bodies should lead to loss of all cilia, flagella, and centrioles. Q.28. Which of the following statements concerning prokaryotic and eukaryotic cells is not correct? A) Prokaryotic cells lack a membrane-bound nucleus. B) Prokaryotic cells contain small membrane-enclosed organelles. C) Eukaryotic cells contain a membrane-bound nucleus. D) DNA, or deoxyribonucleic acid, is present in both prokaryotic cells and eukaryotic cells.
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