Contains hydrolytic enzymes associated with the intracellular digestion of macromolecules A Centriole B Lysosome C Nucleolus D Peroxisome E Ribosome
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Which organelle within the endomembrane system is responsible for the degradation of cellular waste and old organelles? a) Lysosome b) Nucleus c) Peroxisome d) Centriole
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Which cellular structure is responsible for the breakdown of cellular waste and old organelles? a) Lysosome b) Nucleus c) Peroxisome d) Centriole
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Lysosomes are important to eukaryotic cells because they contain: - Starch molecules for energy storage. - Their own DNA molecules. - Digestive (hydrolytic) enzymes. QUESTION 2 Which of the following is not a component of the endomembrane system? - Lysosomes. - Golgi apparatus. - Smooth endoplasmic reticulum. - Rough endoplasmic reticulum. - Mitochondria. QUESTION 3 Which of the following structures or organelles is the site of aerobic respiration? - Lysosome. - Central vacuole. - Glyoxysome. - Smooth endoplasmic reticulum. - Mitochondria. QUESTION 4 A cell has the following molecules and structures: enzymes, nuclear envelope, ribosomes, plasma membrane, peroxisomes, a cellulose-based cell wall, and mitochondria. It could be a cell from: - A bacterium. - An animal, but not a plant. - A plant, but not an animal. - A plant or an animal. - None of the above. QUESTION 5 Ca++ is necessary for muscle cell contraction. Which organelle in muscle tissue stores Ca++? - Smooth endoplasmic reticulum. - Peroxisomes. - Rough endoplasmic reticulum. - Lysosomes. - Ribosomes. QUESTION 6 An organic material foreign to the cell, like alcohol, may end up being modified or destroyed where? - In peroxisomes. - In smooth endoplasmic reticulum. - In proteasomes. - Answers A and B are correct. - All of the above are correct. QUESTION 7 Which of the following statements about plastids in plant cells is FALSE? - They have DNA similar to that of cyanobacteria. - They are used to store water and provide "turgor" pressure for plants. - They may be used to store colored pigments. - They can be the site of photosynthesis. - They may be used to store starch. QUESTION 8 Centrifugation of a cell results in the rupture of the cell membrane and the compacting of the contents into a pellet in the bottom of the centrifuge tube. Bathing this pellet with light yields metabolic activity, including the production of large amounts of NADPH and ATP. One of the contents of this pellet is most likely which of the following? - Lysosomes. - Golgi bodies. - Thylakoids/chloroplasts. - Cytosol. - Mitochondria. QUESTION 9 Components of chloroplasts include: - Cristae and matrix. - Chromatin and nucleoplasm. - Thylakoids and stroma. - A trans region and a cis region. - Lysosomes and phagosomes. QUESTION 10 An individual who is unable to produce one or more of the hydrolytic enzymes normally found in lysosomes could be described as having: - Type II diabetes. - Tay-Sachs disease. - Multiple Sclerosis. - Cancer. - All of the above.
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