B4 OCR 21st Century 5.0 / 5 based on 2 ratings ? BiologyAllGCSEOCR Created by: pixelgoldfishCreated on: 09-05-17 17:43 What organ in a plant exchanges gases? Leaves 1 of 26 Carbon Dioxide + Water = Glucose + Oxygen 2 of 26 Which product is 'wasted' in photosynthesis? Glucose 3 of 26 List 3 uses of glucose in plants. Respiration, cellulose, storage, making proteins 4 of 26 What does an increase in carbon dioxide do to the rate of photosynthesis? Why? Increases it; more reactants 5 of 26 How does an increase in water affect photosynthesis? Increases it 6 of 26 What is a limiting factor of photosynthesis? How? Light; it increases the rate greatly 7 of 26 Define diffusion. Molecules collide, and eventually spread out from a high concentration into a low concentration. 8 of 26 How does temperature increase the rate of diffusion? The molecules are heated and therefore move faster. 9 of 26 What is a semi-permeable membrane? Lets some particles through. 10 of 26 What is osmosis? Water diffuses randomly ínto an area of lower concentration. 11 of 26 What makes a process passive? Requires no energy to work 12 of 26 What minerals are in soil/roots? Metal ions (Mg2+) 13 of 26 Why does diffusion not work in plants? It's attempting to go from a low concentration through the cell membrane into a high concentration. 14 of 26 What is the plant-alternative to diffusion? Active transport 15 of 26 What is potassium used for? Making proteins for growth. 16 of 26 What is nitrogen used for? Rapid growth and photosynthesis 17 of 26 What is phosphorus used for? Photosynthesis 18 of 26 What is magnesium used for? Chlorophyll (absorbing photosynthesis light) 19 of 26 What is a hyper-accumulator? Takes up a lot of minerals, including harmful ones. 20 of 26 What are hypoaccumulators used for? Removing harmful minerals from the soil by containing them. 21 of 26 What are mitochondria used for? Releasing energy from the cell. 22 of 26 List the structures surrounding the nucleus. Nucleus pores, rough ER, smooth ER, cytoplasm. 23 of 26 What does chloroplast contain? Chlorophyll 24 of 26 What is a plant cell wall made of? Cellulose 25 of 26 What is a flagellum used for? What type of cell is it featured in? Do all cells have it? Movement; bacterial; no 26 of 26
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