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Class 8 Science Chapter 8 Cell Structure And Functions Quiz 25 (60 MCQs)

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1. Aiden is helping his younger sister understand how our bodies break down the food we eat. He explains that when we eat a sandwich, the body adds water to help split (or break down) the larger molecules in the bread and cheese during digestion. What is this process called?
2. Which statement is NOT part of the Cell Theory?
3. A certain drug disrupts the Cytoskeleton of cells. Which of the following functions would be affected most directly by this drug?
4. Which of the following is a difference between plant and animal cells?
5. Organisms made of more than one cell are called .....
6. Cells make proteins on small structures called RIBOSOMES.
7. What organelle is called the "powerhouse" of a cell?
8. The shape of RBC
9. Movement of water molecules from high concentration level to the lower concentration level through semipermeable membrane.
10. What is the jelly-like substance where cell organelles are located?
11. Which structure is found only in plant cells?
12. What is contained within the vacuole of a plant cell?
13. This organelle acts like a gatekeeper, allowing some materials to pass through it, but not others.
14. Granular material visible within the nucleus
15. Carries the genetic information that is passed on to each new generation of cells.
16. The study of cell structure and functions is called
17. Which plant organelle transforms light into glucose to use as food?
18. Where in the cell are ribosomes primarily produced?
19. Which of the following is a network of proteins that supports and gives shape to a cell?
20. Digest food particles, disease causing bacteria and worn-out and broken down parts of the cell
21. Which structure helps to move and shape the cell?
22. What is the role of transport proteins in the plasma membrane?
23. Which of the following structures is ALWAYS found in both eukaryotic and prokaryotic cells?
24. Cell organelles like mitochondria, golgi body, endoplasmic reticulum are present in
25. Which scientist is known for the development of the cell theory alongside Matthias Schleiden?
26. Cells can vary greatly in size and shape?
27. Which part of the cell is responsible for producing energy?
28. Which process requires no energy from the cell?
29. The cell wall's purpose is to .....
30. Complex made of DNA, proteins, and some RNA
31. The movement of molecules down a concentration gradient through transport proteins in the cell membrane is a type of
32. What is the role of the endoplasmic reticulum?
33. Which tissue type in plants is responsible for the majority of photosynthesis?
34. Function like tanks where food and other materials needed by the cell are stored.
35. What is the jelly-like fluid that fills the space in the cell called?
36. Cell's suicide bags.
37. What is the main function of lysosomes in a eukaryotic cell?
38. 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?
39. Which cell is specialised to carry electrical signals?
40. The main function of chloroplasts is:
41. What are cells described as in the passage?
42. True or False:Plant and animal cells have all the same organelles.
43. 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?
44. This PLANT cell organelle contains stacks of thylakoids, which use energy from the sun to make glucose.
45. The cell membrane is also called as
46. The ability to maintain a stable internal environment is called ..... La capacidad de mantener un ambiente interno estable se llama .....
47. Compare and contrast active transport and passive transport in cells.
48. ..... are living cells that do not conduct sugar themselves but play a crucial role in assisting the movement of sugars.
49. Which organelle is responsible for controlling most cellular activities by storing genetic material?
50. Captures energy from sunlight and converts it into chemical energy stored in food during photosynthesis. Only found in plant cells.
51. A cell is observed to have a large central vacuole and chloroplasts. What type of cell is it?
52. Both smooth muscle fibers and cardiac muscle fibers:
53. Which statement best describes the main idea of the cell theory?
54. The division of chromosomes is called?
55. Which organelle are sac-like tunnels that have ribosomes attached and whose main function is to make and process proteins?
56. One difference between cardiac muscle fibers and skeletal muscle fibers is that cardiac muscle fibers:
57. What are the endoplasmicreticulum?
58. If a cell's ribosomes stopped working, what would be the most immediate effect on the cell? Explain your reasoning.
59. Pasteurisation is used to preserve
60. What is the function of centrioles in animal cells?
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