specific for ocr gateway additonal science B.
Help!
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| what are the 4 minerals which plants need? | -nitrates
-phosphates
-potassium compounds
-magnesium compounds
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| what are nitrates used for? | to make proteins for growth
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| what are phosphates used for? | -in respiration (releasing energy)
-growth, especially in roots
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| what are potassium compounds used for? | in respiration and photosynthesis
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| what are magnesium compounds used for? | in photosynthesis
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| what does mineral deficiency mean? | when a plant doesn't have enough of a certain mineral
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| what are some symptoms of plants when there's no nitrates? | -poor growth
-yellow leaves
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| what are some symptoms of plants when there's no phosphates? | -poor root growth
-discoloured leaves
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| what are some symptoms of plants when there's no potassium? | -poor fruits and flowers
-discoloured leaves
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| what are some symptoms of plants when there's no magnesium? | yellow leaves
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| explanation of how nitrates are used | nitrogen in nitrates
used to make amino acids
amino acids join together to make different proteins such as enzymes
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| explanation of how phosphates are used | phosphorus in phosphates
used to make cell membranes and DNA
DNA carries genetic information
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| explanation of how potassium is used | helps make some enzymes
enzymes speed up chemical reactions such as photosynthesis and respiration
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| explanation of how magnesium is used | makes chlorophyll molecules
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| what is active transport? | when special carrier molecules take mineral ions across plant cell membranes
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| how do we know that energy is needed for active transport? | because an increase in the uptake of minerals is matched with an increase in its respiration rate
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| what are the minerals absorbed against? | a concentration gradient
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| what do plants abosorb in different amounts and types? | minerals
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| what do plants do with these minerals when absorbing them? | select the minerals it needs
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