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CELL CYTOPLASM IMPORTANT MCQS ( QUIZ ) ( HAFIZ BIOLOGY ) : 1. Which of the following statements about cytoplasm is true? a) It is a rigid, gel -like substance. b) It is located primarily in the nucleus. c) It is responsible for storing genetic information. d) It is the fluid -filled region between the cell membrane and the nucleus. Explanation: The correct answer is d) It is the fluid -filled region between the cell membrane and the nucleus. Cytoplasm is a jelly -like substance tha t fills the cell and surrounds the organelles. It is responsible for various cellular activities and provides a medium for the movement of substances within the cell. 2. Which of the following is NOT a component of cytoplasm? a) Water b) Proteins c) DNA d) O rganelles Explanation: The correct answer is c) DNA. While cytoplasm contains many components, including water, proteins, and organelles, DNA is not a part of the cytoplasm. DNA is primarily found within the nucleus of the cell. 3. Which organelle is responsi ble for protein synthesis in the cytoplasm? a) Nucleus b) Golgi apparatus c) Endoplasmic reticulum d) Mitochondria Explanation: The correct answer is c) Endoplasmic reticulum. The endoplasmic reticulum (ER) is involved in protein synthesis and plays a cru cial role in the production and transportation of proteins within the cytoplasm. The ER can be either rough (with ribosomes) or smooth (without ribosomes). 4. Which of the following functions is NOT associated with the cytoplasm? a) Metabolic reactions b) Ce llular respiration c) Cellular locomotion d) Storage of genetic material Explanation: The correct answer is d) Storage of genetic material. The cytoplasm is responsible for numerous functions, such as metabolic reactions, cellular respiration, and cellular locomotion. However, the storage of genetic material is primarily carried out in the nucleus. 5. Which cytoplasmic structure is responsible for maintaining cell shape and providing support. a) Nucleus b) Mitochondria c) Endoplasmic reticulum d) Cytoskeleton Explanation: The correct answer is d) Cytoskeleton. The cytoskeleton is a network of protein filaments within the cytoplasm that provides structural support to the cell, helps maintain its shape, and facilitates cell movement. The nucleus, mitochondria, a nd endoplasmic reticulum have different functions within the cell. 6. Which of the following is a function of cytoplasm? a) DNA replication b) ATP synthesis c) Photosynthesis d) Cell division Explanation: The correct answer is b) ATP synthesis. Cytoplasm pla ys a vital role in ATP synthesis through various metabolic pathways like glycolysis and oxidative phosphorylation. DNA replication occurs in the nucleus, photosynthesis takes place in chloroplasts, and cell division involves processes in both the nucleus a nd cytoplasm. 7. Which organelle in the cytoplasm is responsible for detoxifying harmful substances? a) Lysosome b) Peroxisome c) Ribosome d) Vacuole Explanation: The correct answer is b) Peroxisome. Peroxisomes are organelles found in the cytoplasm that are involved in detoxification processes. They break down toxic substances like hydrogen peroxide and play a role in lipid metabolism. 8. Which cytoplasmic structure is responsible for intracellular digestion? a) Mitochondria b) Endoplasmic reticulum c) Golgi a pparatus d) Lysosome Explanation: The correct answer is d) Lysosome. Lysosomes are membrane -bound organelles found in the cytoplasm that contain digestive enzymes. They are responsible for intracellular digestion, breaking down unwanted materials, and recy cling cellular components. 9. Which component of cytoplasm is involved in cell signaling and communication? a) Nucleus b) Cytosol c) Endoplasmic reticulum d) Cell membrane Explanation: The correct answer is d) Cell membrane. While the cytosol (liquid part of the cytoplasm) is involved in various cellular processes, the cell membrane plays a crucial role in cell signaling and communication by receiving and transmitting signals to and from the extracellular environment. 10. What is the main function of the c ytoplasmic streaming?
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