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Description
Flashcards by Joy Pidsley, updated more than 1 year ago
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Created by Joy Pidsley
about 7 years ago
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| Question | Answer |
| What is an organic substance? | A molecule that has a high proportion of carbon atoms |
| What is an inorganic substance? | Made of molecules/ions with no more than one carbon atom |
| Why is Mg2+ important in plants? | It is a constituent of chlorophyll. No magnesium = no chlorophyll. Without chlorophyll, plants can't photosynthesise and produce glucose (needed for growth) |
| Why is iron important to humans? | It is a constituent of haemoglobin which transports oxygen around the blood |
| What are phosphate ions used for? | Making nucleotides (e.g. ATP) Forming biological membranes from phospholipids |
| What are Ca2+ ions used for? | Bones + teeth in mammals Cell walls in plants |
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