This quiz works best with JavaScript enabled. Home > Cbse > Class 8 > Science > Cell Structure And Functions > Class 8 Science Chapter 8 Cell Structure And Functions – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 8 Cell Structure And Functions Quiz 19 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the function of lysosomes in animal cells? A) Photosynthesis. B) Digestion of waste materials. C) DNA replication. D) Protein synthesis. Show Answer Correct Answer: B) Digestion of waste materials. 2. Contains the genetic material, DNA, and codes the instructions for making proteins and other important molecules. A) Ribosomes. B) Nucleus. C) Vacuoles. D) Cell wall. Show Answer Correct Answer: B) Nucleus. 3. Which of the following statement is incorrect about Gram positive bacteria? A) Thickness of the wall is 20-80 nm. B) Presence of 2 layers in wall. C) Peptidoglycan content is more than 50%. D) Teichoic acid is present in wall. Show Answer Correct Answer: B) Presence of 2 layers in wall. 4. What is the function of vacuole A) Storage of food and water. B) Protein synthesis. C) All the above. D) None of the above. Show Answer Correct Answer: A) Storage of food and water. 5. Assembles proteins for release or for other organelles. The rough endoplasmic reticulum has ribosomes on its surface. A) Cytoskeleton. B) Endoplasmic reticulum. C) Cell membrane. D) Vacuoles. Show Answer Correct Answer: B) Endoplasmic reticulum. 6. Where does photosynthesis occur? A) Stomata. B) Chloroplast. C) Mitochondria. D) Xylem. Show Answer Correct Answer: B) Chloroplast. 7. This structure is a flexible covering that protects the inside of the cell A) Cell Membrane. B) Nucleus. C) Proteins. D) Cell Wall. Show Answer Correct Answer: A) Cell Membrane. 8. Produces proteins A) Ribosomes. B) Endoplasmic reticulum. C) Golgi apparatus. D) Mitochondria. Show Answer Correct Answer: B) Endoplasmic reticulum. 9. What is the significance of understanding the molecular basis of physiological processes? A) It helps in understanding diseases. B) It only focuses on genetics. C) It is not significant. D) It is only for theoretical knowledge. Show Answer Correct Answer: A) It helps in understanding diseases. 10. If dense bone lacked canaliculi: A) There would be no blood supply to the cells. B) The extracellular matrix would not be formed by osteoblasts. C) Diffusion between cells would not be possible. D) There would be no nerve supply to the tissue. Show Answer Correct Answer: C) Diffusion between cells would not be possible. 11. Which of the following is a function of the cell membrane? A) Protein synthesis. B) Photosynthesis. C) DNA replication. D) Selective permeability. Show Answer Correct Answer: D) Selective permeability. 12. Proteins and other materials are processed in and shipped out of a eukaryotic cell by the ..... A) Golgi complex. B) Adenosine triphosphate (ATP). C) Mitochondria. D) None of the above. Show Answer Correct Answer: A) Golgi complex. 13. Proteins are made on these small structures. * A) E.R. B) Ribosomes. C) Lysosomes. D) Mitochondria. Show Answer Correct Answer: B) Ribosomes. 14. Which among the following insects is vector of the Dengue virus A) Cockroach. B) Female Anopheles Mosquito. C) Female Aedes Mosquito. D) House fly. Show Answer Correct Answer: C) Female Aedes Mosquito. 15. Which one of the following is not part of the cell theory? A) All living things are made of cells. B) Cells are the basic units of structure and function of living things. C) New cells are produced from existing cells. D) Cells never die. Show Answer Correct Answer: D) Cells never die. 16. STAINSARE USED TO COLOUR PARTS OF THE CELL TO STUDY DETAILED STRUCTURE A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 17. What is the role of synovial membranes? A) Line the joints and provide lubrication. B) Cover the skin. C) Transport nutrients. D) Store fat. Show Answer Correct Answer: A) Line the joints and provide lubrication. 18. Discuss the strategic role of mitochondria in energy metabolism within the cell. A) Mitochondria synthesize proteins for energy. B) Mitochondria store energy in the form of lipids. C) Mitochondria replicate DNA for energy production. D) Mitochondria convert glucose into ATP, the energy currency of the cell, through cellular respiration. Show Answer Correct Answer: D) Mitochondria convert glucose into ATP, the energy currency of the cell, through cellular respiration. 19. What are the working structures within each cell called that carry out a specific function? A) Cells. B) Organs. C) Organelles. D) Organisms. Show Answer Correct Answer: C) Organelles. 20. ..... contain the green pigment chlorophyll, which help plant in making food A) Chloroplasts. B) Cell Wall. C) Leucoplasts. D) Chromoplasts. Show Answer Correct Answer: A) Chloroplasts. 21. Assertion (A):Amoeba and Paramecium are unicellular organismReasoning (R):Unicellular organisms only have one cell A) Both A & R are true and R is the correct explanation for A. B) Both A & R are true but R is not the correct explanation for A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: A) Both A & R are true and R is the correct explanation for A. 22. What is the primary role of vascular tissue in plants? A) Transport water and nutrients. B) Provide support. C) Store food. D) Protect against pathogens. Show Answer Correct Answer: A) Transport water and nutrients. 23. A ..... is a protective layer that covers the cell's surface and acts as a barrier. A) Mitochondria. B) Cytoplasm. C) Nucleus. D) Cell membrane. Show Answer Correct Answer: D) Cell membrane. 24. Assertion (A):The cell membrane is selectively permeable. Reason (R):It allows only certain substances to pass through while blocking others. A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. B) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. C) Assertion is true, but Reason is false. D) Assertion is false, but Reason is true. Show Answer Correct Answer: A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. 25. Which cell organelle is called power house of the cell A) Endoplasmic reticulum. B) Chloroplast. C) Mitochondria. D) Ribosome. Show Answer Correct Answer: C) Mitochondria. 26. The thin, flexible barrier around a cell is called the ..... A) Plasma membrane. B) Cell wall. C) Nuclear envelope. D) Cytoplasm. Show Answer Correct Answer: A) Plasma membrane. 27. Who looked at cork and named the cell? A) Francesco Redi. B) Robert Hooke. C) Van Leeuwenhoek. D) Robert Brown. Show Answer Correct Answer: B) Robert Hooke. 28. This uses energy A) Endocytosis. B) Exocytosis. C) Both. D) None of the above. Show Answer Correct Answer: C) Both. 29. What is the rigid layer of nonliving material that surrounds the cells of plants and other organisms called? A) Cell membrane. B) Nucleus. C) Cell wall. D) Cytoplasm. Show Answer Correct Answer: C) Cell wall. 30. Which of the following organelles always contains DNA? A) Golgi complex. B) Mitochondria. C) Centriole. D) Lysosome. Show Answer Correct Answer: B) Mitochondria. 31. The control unit of the cell is A) Cytoplasm. B) Protoplasm. C) Nucleus. D) Nucleoplasm. Show Answer Correct Answer: C) Nucleus. 32. What structures distinguish a plant cell from an animal cell? A) Plant cells have cell walls and ribosomes. B) Plant cells have cell walls and chloroplasts. C) Plant cells have chloroplasts and ribosomes. D) Plant cells have chloroplasts and mitochondria. Show Answer Correct Answer: B) Plant cells have cell walls and chloroplasts. 33. What is the function of ground tissue in plants? A) Provides strength and support. B) Transports water. C) Stores food and water. D) Both A and C. Show Answer Correct Answer: D) Both A and C. 34. How does diffusion differ from active transport? A) Diffusion only occurs in plant cells; active transport only occurs in animal cells. B) Active transport is a passive process; diffusion is not. C) Diffusion requires energy; active transport does not. D) Active transport moves substances against the concentration gradient; diffusion does not. Show Answer Correct Answer: D) Active transport moves substances against the concentration gradient; diffusion does not. 35. Priya is working in a hospital laboratory, analyzing how the body repairs itself after an injury. She observes that certain molecules, like enzymes, are crucial in regulating, building, and supporting various bodily functions during the healing process. Which type of molecule is responsible for these roles? A) Lipids. B) Nucleic Acids. C) Proteins. D) Carbohydrates. Show Answer Correct Answer: C) Proteins. 36. What unique feature do some bacteria have for movement? A) Flagella. B) Cilia. C) Chloroplasts. D) Vacuoles. Show Answer Correct Answer: A) Flagella. 37. Regardless of type, all cells A) Have a cell membrane. B) Have cytoplasm. C) Can duplicate themselves by undergoing cell division. D) All of the above. Show Answer Correct Answer: D) All of the above. 38. What is the function of vesicles in the cell? A) To break down and recycle cell parts. B) To transport substances to other parts of the body. C) To produce energy for the cell. D) To store genetic material. Show Answer Correct Answer: B) To transport substances to other parts of the body. 39. What is the correct order of organization from simplest to most complex in living organisms? A) Cells, tissues, organs, systems. B) Organs, tissues, cells, systems. C) Tissues, cells, organs, systems. D) Systems, organs, tissues, cells. Show Answer Correct Answer: A) Cells, tissues, organs, systems. 40. The power house of cell is called A) Cell wall. B) Mitochondria. C) Ribosomes. D) Nucleus. Show Answer Correct Answer: B) Mitochondria. 41. Which of the following is NOT an example of homeostasis? A) A human producing gametes. B) A dog stealing chicken off the kitchen counter when hungry. C) A plant bending toward sunlight. D) A bird drinking water when thirsty. Show Answer Correct Answer: A) A human producing gametes. 42. What is the primary role of the lysosome? A) DNA replication. B) Protein modification. C) Lipid synthesis. D) Cellular digestion. Show Answer Correct Answer: D) Cellular digestion. 43. It controls the movement of substances into and out of cells. It is semipermeable. * A) Nucleus. B) Vesicles. C) Cell membrane. D) Cell wall. Show Answer Correct Answer: C) Cell membrane. 44. Scarlett is conducting a survey and collects data from 20 participants. She wants to calculate the degrees of freedom for her sample. How should Scarlett calculate the degrees of freedom? A) Dividing the standard deviation by the square root of the sample size. B) Subtracting one from the sample size. C) Adding together all values and dividing by the sample size. D) Squaring the difference between the observed and expected values. Show Answer Correct Answer: B) Subtracting one from the sample size. 45. This cell organelle does not contain DNA A) Lysosomes. B) Nucleus. C) Chloroplast. D) Mitochondria. Show Answer Correct Answer: A) Lysosomes. 46. Cells use active transport proteins to A) Break down molecules. B) Detect the charge of molecules. C) Obtain molecules they need. D) Engulf large particles. Show Answer Correct Answer: C) Obtain molecules they need. 47. A rigid structure outside of the cell membrane that protects a cell from viruses and other harmful organisms. A) Cell Wall. B) Cell Membrane. C) Golgi Body. D) Nucleus. Show Answer Correct Answer: A) Cell Wall. 48. Muramic acid is seen in ..... cell wall A) Bacterial cell wall. B) Fungi wall. C) Virus. D) None. Show Answer Correct Answer: A) Bacterial cell wall. 49. What is the function of the ribosomes? A) Produce energy (ATP). B) Make proteins. C) Package and ship proteins. D) Store water, food, and wastes. Show Answer Correct Answer: B) Make proteins. 50. Used in places where diffusion needs to occur, such as blood vessels and air sacs of lung A) Simple cuboidal. B) Stratified squamous. C) Simple squamous. D) Simple columnar. Show Answer Correct Answer: C) Simple squamous. 51. Analyze how the structure of the nucleus supports its function in the cell. A) Its porous membrane allows for the exchange of materials necessary for DNA replication and transcription. B) Its solid structure prevents any material from entering or leaving. C) Its small size allows it to move easily within the cell. D) Its thick walls protect the DNA from damage. Show Answer Correct Answer: A) Its porous membrane allows for the exchange of materials necessary for DNA replication and transcription. 52. What process involves the movement of water across a semipermeable membrane? A) Osmosis. B) Diffusion. C) Active transport. D) Endocytosis. Show Answer Correct Answer: A) Osmosis. 53. What is the name of muscle cells? A) Muscle Cells. B) Spindle Shaped Cell. C) All the above. D) None of the above. Show Answer Correct Answer: B) Spindle Shaped Cell. 54. When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of A) Osmosis. B) Diffusion. C) Equilibrium. D) None of the above. Show Answer Correct Answer: C) Equilibrium. 55. Small membrane bordered structures containing chemicals and enzymes used for digestion and disposal of waste. A) Ribosomes. B) Golgi bodies. C) Lysosomes. D) Vacuoles. Show Answer Correct Answer: C) Lysosomes. 56. What are the cells which are round, spherical or elongated? A) White Blood Cell of human beings. B) Red Blood Cell of human beings. C) All the above. D) None of the above. Show Answer Correct Answer: B) Red Blood Cell of human beings. 57. Who proposed the theory that "cells arise only from the pre-existing cells" A) Virchow. B) Brown. C) Haeckel. D) Mohl. Show Answer Correct Answer: A) Virchow. 58. Stores water and food for the cell. Very large in a plant. A) Cytoplasm. B) Cell wall. C) Vacuole. D) Chloroplast. Show Answer Correct Answer: C) Vacuole. 59. Which part of the cell contains genetic information? A) Nucleus. B) Vacuole. C) Cell wall. D) Cytoplasm. Show Answer Correct Answer: A) Nucleus. 60. Which of the following saves the specimen / material from drying? A) Safranin. B) Water. C) Glycerine. D) Red ink. Show Answer Correct Answer: C) Glycerine. ← PreviousNext →Related QuizzesScience QuizzesClass 8 QuizzesClass 8 Science Chapter 8 Cell Structure And Functions Quiz 1Class 8 Science Chapter 8 Cell Structure And Functions Quiz 2Class 8 Science Chapter 8 Cell Structure And Functions Quiz 3Class 8 Science Chapter 8 Cell Structure And Functions Quiz 4Class 8 Science Chapter 8 Cell Structure And Functions Quiz 5Class 8 Science Chapter 8 Cell Structure And Functions Quiz 6Class 8 Science Chapter 8 Cell Structure And Functions Quiz 7Class 8 Science Chapter 8 Cell Structure And Functions Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books