This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 8 Cell Structure And Functions – Quiz 63 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 8 Cell Structure And Functions Quiz 63 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Cells can vary greatly in size and shape? A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 2. Which part of the cell is responsible for producing energy? A) Mitochondria. B) Nucleus. C) Ribosome. D) Chloroplast. Show Answer Correct Answer: A) Mitochondria. 3. Which process requires no energy from the cell? A) Exocytosishypotonic. B) Endocytosis. C) Active transport. D) Facilitated diffusion. Show Answer Correct Answer: D) Facilitated diffusion. 4. The cell wall's purpose is to ..... A) Photosynthesis. B) Give support and structure. C) Holds genetic information. D) Allows things to enter and exit. Show Answer Correct Answer: B) Give support and structure. 5. Complex made of DNA, proteins, and some RNA A) Chromosomes. B) Centrosomes. C) Peroxisomes. D) Chromatin. Show Answer Correct Answer: D) Chromatin. 6. The movement of molecules down a concentration gradient through transport proteins in the cell membrane is a type of A) Selective transport. B) Osmosis. C) Energy expenditure. D) Facilitated diffusion. Show Answer Correct Answer: D) Facilitated diffusion. 7. What is the role of the endoplasmic reticulum? A) Synthesize proteins and lipids. B) Store genetic information. C) Produce energy. D) Transport materials. Show Answer Correct Answer: A) Synthesize proteins and lipids. 8. Which tissue type in plants is responsible for the majority of photosynthesis? A) Xylem. B) Phloem. C) Parenchyma. D) Collenchyma. Show Answer Correct Answer: C) Parenchyma. 9. Function like tanks where food and other materials needed by the cell are stored. A) Vacuoles. B) Chloroplast. C) Photosynthesis. D) None of the above. Show Answer Correct Answer: A) Vacuoles. 10. What is the jelly-like fluid that fills the space in the cell called? A) Lysosome. B) Vesicle. C) Nucleolus. D) Cytoplasm. Show Answer Correct Answer: D) Cytoplasm. 11. Cell's suicide bags. A) ORGANELLES. B) LYSOSOMES. C) ROUGH. D) NUCLEUS. Show Answer Correct Answer: B) LYSOSOMES. 12. What is the main function of lysosomes in a eukaryotic cell? A) To produce energy. B) To synthesize proteins. C) To digest cellular waste. D) To conduct photosynthesis. Show Answer Correct Answer: C) To digest cellular waste. 13. A scientist discovers a new organism that is made up of only one cell and lacks membrane-bound organelles. What can the scientist conclude about this organism? A) It is a eukaryote. B) It is a prokaryote. C) It is multicellular. D) It is a virus. Show Answer Correct Answer: B) It is a prokaryote. 14. Which macromolecule serves as enzymes to speed up chemical reactions in cells? A) Nucleic acids. B) Carbohydrates. C) Lipids. D) Proteins. Show Answer Correct Answer: D) Proteins. 15. Which cell is specialised to carry electrical signals? A) Root hair cell. B) Nerve cell. C) Red blood cell. D) Muscle cell. Show Answer Correct Answer: B) Nerve cell. 16. The main function of chloroplasts is: A) To control what enters and leaves the cell. B) To break down food to release energy for the cell. C) To control all activities of the cell. D) To produce food for the cell using the sun's energy. Show Answer Correct Answer: D) To produce food for the cell using the sun's energy. 17. What are cells described as in the passage? A) Building blocks of all living things. B) Tiny organisms visible to the naked eye. C) Unimportant parts of microorganisms. D) Only found in the human body. Show Answer Correct Answer: A) Building blocks of all living things. 18. True or False:Plant and animal cells have all the same organelles. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. Hydrogen cyanide (HCN) is a highly toxic substance that can kill human beings within 60 seconds. HCN inhibits enzymes that are involved in the production of ATP in the presence of oxygen. Which one of the following cell structures would be most affected by HCN? A) Cell membrane. B) Mitochondria. C) Nucleus. D) Ribosome. Show Answer Correct Answer: B) Mitochondria. 20. This PLANT cell organelle contains stacks of thylakoids, which use energy from the sun to make glucose. A) Cell wall. B) Vacuole. C) Chloroplast. D) None of the above. Show Answer Correct Answer: C) Chloroplast. 21. The cell membrane is also called as A) Cell wall. B) Plasma membrane. C) Both a & b. D) None of these. Show Answer Correct Answer: B) Plasma membrane. 22. The ability to maintain a stable internal environment is called ..... La capacidad de mantener un ambiente interno estable se llama ..... A) Metabolism. B) Mitosis. C) Heterozygous. D) Homeostasis. Show Answer Correct Answer: D) Homeostasis. 23. Compare and contrast active transport and passive transport in cells. A) Both require energy and move substances against the concentration gradient. B) Active transport requires energy, while passive transport does not. C) Both do not require energy and move substances with the concentration gradient. D) Passive transport requires energy, while active transport does not. Show Answer Correct Answer: B) Active transport requires energy, while passive transport does not. 24. ..... are living cells that do not conduct sugar themselves but play a crucial role in assisting the movement of sugars. A) Sieve tube elements. B) Sieve plate. C) Tracheids. D) Companion cells. Show Answer Correct Answer: D) Companion cells. 25. Which organelle is responsible for controlling most cellular activities by storing genetic material? A) Lysosome. B) Ribosome. C) Golgi apparatus. D) Nucleus. Show Answer Correct Answer: D) Nucleus. ← PreviousNext →Related 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 8Class 8 Science Chapter 8 Cell Structure And Functions Quiz 9Class 8 Science Chapter 8 Cell Structure And Functions Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books