6134913
Description
Flashcards by Mel Hughes, updated more than 1 year ago
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Created by Mel Hughes
over 8 years ago
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| Question | Answer |
| What are proteins made of? | Long chains of amino acids |
| What is meant by the term 'denatured'? | The protein/enzyme changes shape and will stop working |
| Which enzyme digests starch? | Amylase |
| Where is bile produced? | In the liver |
| Which enzyme is used to convert glucose into fructose? | Isomerase |
| How do enzymes get into rivers? | Water from dishwashers and washing machines passes into the sewage system and may eventually reach the rivers |
| Which two factors can alter the shape of an enzyme? | Temperature and pH |
| Where is amylase produced? | Salivary glands, pancreas and the small intestine |
| What are the products of lipid (fat) digestion? | Fatty acids and glycerol |
| Which acid is produced by the stomach? | Hydrochloric acid |
| What is the function of bile? | Bile neutralises acid from the stomach when food passes into the small intestine |
| Why are proteases used in baby foods? | The protease pre-digests protein so the baby can absorb it more easily |
| Give two types of reaction controlled by enzymes in the cells | Two of: Builds large molecules from small molecules, changes one molecule into another, breaks down large molecules into small molecules |
| Why does increasing the temperature increase the rate of a reaction? | The molecules have more energy so they move around faster and collide more often and more vigorously so there are more frequent collisions in a given time |
| Give one advantage of using enzymes in industry | Less energy or expensive equipment is needed because the reactions can take place at normal temperature and pressure |
| Give one disadvantage of using enzymes in industry | Costly to produce, denatured at high temperatures |
| Why do biological washing powders work more efficiently than non-biological powders? | The enzymes speed up the digestion of stains from food, blood and grass, plus lower temperatures can be used in washing machines |
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