School / Cambridge IGCSE / 0610 / Cells and movement of substances Question practice
Cells and movement of substances About this practice Magnification, diffusion and osmosis.
Biology Cells and movement of substances
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1 A cell image is 48 mm long. The actual cell is 0.12 mm long. Calculate the magnification. Easy 3 marks Calculator + 3 State three structures found in a plant cell but not in an animal cell. Easy 3 marks No calculator + 4 Define diffusion, and explain why a substance diffuses faster when the concentration gradient is steeper. Easy 3 marks No calculator + 5 Explain why a red blood cell placed in distilled water eventually bursts (lyses), while a plant cell placed in distilled water does not. Easy 3 marks No calculator + 6 Explain why active transport, unlike diffusion, requires energy from respiration. Easy 3 marks No calculator + 7 Root hair cells are adapted for the efficient uptake of water and mineral ions. Describe two features of a root hair cell that adapt it for this function. Easy 3 marks No calculator + 8 Outline the function of the nucleus, cell membrane and cytoplasm in a generalised animal cell. Easy 3 marks No calculator + 9 A student is given an unlabelled slide and asked to determine whether the cells shown are plant or animal cells. State two observable features that would allow this distinction. Easy 2 marks No calculator + 10 Explain why, in a osmosis experiment using visking (dialysis) tubing, glucose can pass through the tubing but starch cannot. Easy 3 marks No calculator + 11 Explain, using an example, the difference between a tissue, an organ and an organ system. Easy 3 marks No calculator + 12 Describe three features of a sperm cell that adapt it for its function of fertilising an egg cell. Easy 3 marks No calculator + 13 Describe three features of a nerve cell (neurone) that adapt it for its function of rapidly transmitting electrical impulses. Easy 3 marks No calculator + 14 Describe three features of a palisade mesophyll cell that adapt it for efficient photosynthesis. Easy 3 marks No calculator + 15 Describe three features of a red blood cell that adapt it for its function of transporting oxygen. Easy 3 marks No calculator + 16 An image of a cell has a magnification of ×250. If the image is 20 mm long, calculate the actual length of the cell, in micrometres (μm). Easy 3 marks Calculator + 17 A cell has an actual length of 0.025 mm. Calculate the length of its image, in mm, at a magnification of ×2000. Easy 2 marks Calculator + 19 Explain why surface area to volume ratio decreases as an organism (or cell) increases in size, and state why this is important for larger organisms. Easy 3 marks No calculator + 20 State three factors, other than the concentration gradient, that affect the rate of diffusion. Easy 3 marks No calculator + 21 Explain how facilitated diffusion allows large or charged molecules, such as glucose, to cross a cell membrane, and state one way it is similar to simple diffusion. Easy 3 marks No calculator + 22 State what a plant cell wall is made of, and describe two functions it performs. Easy 3 marks No calculator + 23 State a formal definition of osmosis, in terms of water potential and a partially permeable membrane. Easy 3 marks No calculator + 24 Describe three features of a xylem vessel that adapt it for the transport of water. Easy 3 marks No calculator + 25 Describe three features of phloem tissue that adapt it for the transport of dissolved sugars (translocation). Easy 3 marks No calculator + Self-assessed Not marked yet
Set total 75
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