GRADE 8 Science – Movement of materials in and out of the cell Quiz
1. Which of the following is responsible for controlling the movement of materials in and out of the cell?
The cell membrane acts as a barrier that selectively allows materials to move in and out of the cell.
2. Which organelle is responsible for storing water, food, and waste in a plant cell?
The vacuole stores water, food, and waste in a plant cell, helping regulate the movement of substances.
3. What is the function of the mitochondria in a cell?
Mitochondria are known as the powerhouse of the cell, producing energy through cellular respiration.
4. Which structure in a plant cell is responsible for conducting photosynthesis?
Chloroplasts contain chlorophyll and are where photosynthesis occurs in plant cells.
5. What is the function of the cytoplasm in a cell?
The cytoplasm contains organelles and provides a medium for cellular processes to occur.
6. Which organelle is responsible for producing proteins in a cell?
The endoplasmic reticulum is involved in protein synthesis and transport within the cell.
7. Which organelles contain enzymes for breaking down waste in a cell?
Lysosomes contain digestive enzymes that break down waste materials and cellular debris in the cell.
8. What is the function of the Golgi apparatus in a cell?
The Golgi apparatus modifies, sorts, and packages proteins and lipids for transportation within and outside the cell.
9. Which organelle is responsible for regulating what enters and exits the nucleus of a cell?
The nuclear membrane surrounds and protects the nucleus, regulating the flow of materials in and out of it.
10. What is the function of the cell wall in a plant cell?
The cell wall is a rigid structure that provides support and protection for plant cells, helping maintain their shape.
11. What is the process by which plants absorb water through their roots?
Plants absorb water through their roots via the process of osmosis, where water moves from an area of high concentration (soil) to low concentration (cells).
12. Which compound is responsible for carrying oxygen in red blood cells?
Hemoglobin is the protein responsible for carrying oxygen in red blood cells, allowing for the transport of oxygen to various parts of the body.
13. How do most nutrients enter the cells of the small intestine?
Most nutrients enter the cells of the small intestine through active transport, which requires energy and moves substances against their concentration gradient.
14. In which organelle does cellular respiration take place?
Cellular respiration takes place in the mitochondria, where glucose is broken down to produce energy in the form of ATP.
15. What is the main function of the cell membrane?
The cell membrane controls the movement of materials into and out of the cell, allowing for the passage of nutrients and waste while maintaining cellular homeostasis.
16. What process do plants use to convert sunlight into energy?
Plants convert sunlight into energy through the process of photosynthesis, where they use chlorophyll to capture light energy and convert it into glucose.
17. Which structure in a plant cell is responsible for storing water, nutrients, and waste?
The vacuole in a plant cell is responsible for storing water, nutrients, and waste, helping to maintain turgor pressure and store essential molecules.
18. What is the function of the cilia in a cell?
Cilia are hair-like structures in a cell that assist in movement, helping cells to move or move substances over the cell surface.
19. Which process involves the removal of waste products from the cell?
Exocytosis is the process by which cells expel waste products by fusing a vesicle containing the waste with the cell membrane to release its contents outside.
20. What is the role of the ribosomes in a cell?
Ribosomes are responsible for protein synthesis in a cell, where they translate the genetic code from the DNA into functional proteins for cellular functions.
21. Which organelle is responsible for controlling what goes in and out of the cell?
The cell membrane is a semipermeable membrane that controls the movement of materials in and out of the cell.
22. What is the process by which materials move into a cell without the use of energy called?
Diffusion is the process where molecules move from an area of high concentration to an area of low concentration, without the use of energy.
23. Which of the following substances requires energy to move them across the cell membrane?
Glucose requires energy to be transported across the cell membrane, as it moves against the concentration gradient.
24. What is the process where cells engulf large particles by wrapping the cell membrane around them called?
Endocytosis is the process where cells engulf large particles by wrapping the cell membrane around them and bringing them into the cell.
25. Which type of transport requires the use of transport proteins to move molecules across the cell membrane?
Facilitated diffusion is the type of transport that requires the use of transport proteins to move molecules across the cell membrane.
26. In which direction do molecules move during osmosis?
During osmosis, water molecules move from an area of high concentration to an area of low concentration, across a semipermeable membrane.
27. Which of the following processes requires the cell to use energy to move molecules against the concentration gradient?
Active transport is the process where cells use energy to move molecules against the concentration gradient, from low to high concentration.
28. Which organelle helps in packaging and transporting materials within the cell?
The Golgi apparatus helps in packaging and transporting materials within the cell, including those that need to be secreted outside the cell.
29. Which term describes the process where cells release materials outside the cell by enclosing them in a vesicle?
Exocytosis is the process where cells release materials outside the cell by enclosing them in a vesicle that fuses with the cell membrane.
30. What happens to a plant cell when placed in a hypertonic solution?
When a plant cell is placed in a hypertonic solution with higher solute concentration, water moves out of the cell, causing it to shrink.
31. Which process involves the movement of water molecules across a selectively permeable membrane?
Osmosis is the process where water molecules move across a selectively permeable membrane to balance the concentration of solutes on either side.
32. How does facilitated diffusion differ from simple diffusion?
Facilitated diffusion involves the use of transport proteins to move molecules across the cell membrane, unlike simple diffusion which does not require proteins.
33. Which of the following substances is likely to diffuse through the cell membrane most easily?
Small nonpolar molecules are likely to diffuse through the cell membrane most easily as they can pass through the lipid bilayer without the need for transport proteins.
34. What type of transport process moves molecules from an area of low concentration to an area of high concentration using energy?
Active transport is the type of transport process that moves molecules from an area of low concentration to an area of high concentration, requiring energy to do so.
35. Which of the following is a function of the cell membrane in regards to movement of materials?
One of the functions of the cell membrane is to control the passage of substances in and out of the cell, allowing only specific materials to pass through.
36. What is the term for the uptake of small droplets of extracellular fluid by the cell?
Pinocytosis is the process where a cell takes in small droplets of extracellular fluid and dissolved solutes by forming vesicles in the cell membrane.
37. Which transport process requires a concentration gradient to move molecules across the cell membrane?
Facilitated diffusion relies on a concentration gradient to move molecules across the cell membrane, with the assistance of transport proteins.
38. How do plants obtain carbon dioxide needed for photosynthesis?
Plants obtain carbon dioxide needed for photosynthesis through diffusion, as carbon dioxide moves from the atmosphere into the plant cells.
39. What happens to an animal cell when placed in a hypotonic solution?
When an animal cell is placed in a hypotonic solution with lower solute concentration, water moves into the cell, causing it to swell.
40. Which organelle is responsible for breaking down waste materials in the cell?
Lysosomes are small organelles that contain enzymes responsible for breaking down waste materials and cellular debris in the cell.
41. The movement of molecules from an area of high concentration to an area of low concentration is known as?
Diffusion is the movement of molecules from an area of high concentration to an area of low concentration, without the input of energy.
42. Which transport process requires the cell to expend energy to move molecules?
Active transport is the transport process that requires the cell to expend energy to move molecules against the concentration gradient.
43. What is the term for the engulfing of large solid particles by the cell?
Phagocytosis is the process where a cell engulfs large solid particles or other cells by forming extensions of the cell membrane called pseudopods.
44. Which of the following is a function of the Golgi apparatus in relation to movement of materials within the cell?
The Golgi apparatus plays a role in modifying and packaging proteins produced by the cell before transporting them to their final destination within or outside the cell.
45. What is the term for the process where cells take in large particles by engulfing them through the cell membrane?
Phagocytosis is the process where cells take in large particles by engulfing them through the cell membrane, often seen in immune cells engulfing pathogens.
46. Which of the following is a function of the plant cell wall in relation to movement of materials?
The plant cell wall provides structural support to the cell and regulates the movement of materials in and out of the cell, but it is not involved in actively controlling the passage of substances like the cell membrane.