Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Enzymes and food
Enzymes and testing food molecules
| Question | Answer |
|---|---|
| What is the enzymes function? | The enzymes function is to break down large molecules into smaller ones. The What enzymes break down fat? |
| What enzymes break down protein? | Protease |
| What enzymes break down starch (or other carbohydrates)? | Amylase (or carbohydrase) |
| What helps digest food in your stomach? | Hydrochloric acid |
| where are the amylase produced? | salivary glands (in the mouth) pancreas and small intestine |
| where are the protease produced | stomach pancreas and the small intestine |
| where are the lipase produced? | pancreas and the small intestine |
| what does lipase do? | breaks down fats |
| what does protease do? | breaks down protease. |
| WHAT DOES CARBOHYDRASE DO? | breaks down carbohydrates. |
| What are carbohydrates broken into? | carbohydrates are broken down into smaller sugars |
| What are proteins broken into? | carbohydrates are broken down into smaller amino acids |
| What are fats broken into? | carbohydrates are broken down into smaller fatty acids |
| In the visking tube experiment, why did we keep the temperature at 37C? | because this is the temperature where enzymes work best at |
| what happens to enzymes when the temperature gets above 37C? | the enzymes change shape (they denature) and the substrate can not join to the enzyme (they should have complementary shape) in the active site |
| Explain why the rate of digestion of starch increases as temperature increases. | the amylase and the starch molecules move faster; collision are taking place more often and with more energy so the molecules stick more often together |
| Give the names of three substances which are absorbed into the blood without being digested | vitamins, minerals and sugar |
| Which substance passes through the body without being digested? | fibres |
| Explain why only sugar can get into the blood (and not starch)? | because sugar is small so it goes through the walls of the intestines |
| what is the chemical test for starch? | iodine; if there is NO starch, iodine stays brown if there is starch, Iodine turns blue |
| what is the chemical test for sugar? | Benedict AND heat; if there is NO sugar, Benedict stays blue if there is sugar, Benedict turns red brick (orange) |
| what does Benedict and heat test for? | sugar (glucose) |
| What does iodine test for? | starch |
| what colour does iodine turn if there is starch? | blue-black |
| What colour does Benedict turn is there is sugar? | orange (brick red) |
| Describe an experiment to show that starch is digested by amylase in the intestines/Visking tube | add amylase to a sample of starch in a visking tube; leave for a few hours at 37C; add iodine to a sample of the inside of the visking tube: it will remain orange; add benedict solution to another sample: it will turn from blue to red brick |
| Describe an experiment to show that starch can not go through the intestine walls but sugar can | mixture of starch and sugar in a visking tube in a beaker of water; leave for a few hours; test inside and outside of the visking tube with iodine (inside turns black); test inside and outside of the visking tube with benedict’s (outside turns brick red) |
| Describe how a sample of cow’s milk could be tested for protein. | place sample in Biuret solution; the presence of protein is indicated by the solution turning from blue to purple |
Created by:
ursulinebio
Popular Biology sets