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Biology T6 Revision
Biology T6 Revision GCSE Science Ormerod
| Question | Answer |
|---|---|
| What is a group of similar cells that work together called? | Tissue |
| Which is bigger: 3 x 10-8 or 3 x 10-16 | 3x10-8 |
| Which organ system includes the heart? | Circulatory system |
| What role do the teeth play in digestion? | Mechanically breaks down food |
| Name the tube that carries food from the mouth to the stomach? | Oesophagus |
| What is the name of the enzyme secreted by the salivary gland? | Amylase |
| What do the gastric pits in the stomach secrete? | Hydrochloric acid and pepsin (gastric juice) |
| Name the three macromolecules | Starch (carbohydrates), protein, lipids (fats) |
| Which macromolecule is broken down by protease? | Protein |
| Which macromolecule is broken down by lipase? | Lipids (fats) |
| Which macromolecule is broken down by pepsin? | Protein |
| Which macromolecule is broken down by amylase? | Starch |
| Which of the following is not a macromolecule: starch, sugar, protein, fat? | Sugar |
| Which organ secretes protease, lipase and amylase? | Pancreas |
| Why does the small intestine have villi? | To increase surface area |
| What happens to small molecules in the small intestine? | They are absorbed into the blood |
| Define the term ‘catalyst’ | A substance that increases the rate of a chemical reaction |
| Name the part of an enzyme which is involved in reactions | Active site |
| Define the term ‘substrate’ | The substance that the enzyme is acting on |
| What has to match in order for an enzyme to work? | The shape of the active site and the shape of the substrate |
| What is the name of the theory used to describe how enzymes work? | Lock and key theory |
| What does the term ‘denatured’ mean? | The structure of an enzyme is changed so that it doesn’t work |
| What factors might denature an enzyme? | pH and temperature |
Created by:
lesleycollins
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