Biology B4 revision
- Created by: Saffron Adams
- Created on: 06-01-13 15:25
View mindmap
- B4 revision
- Life processes
- MAKING ENZYMES
- Enzymes are catalyst that speed up chemical reactions
- They are proteins made up of long chains of amino acids
- Enzymes are catalyst that speed up chemical reactions
- How do enzymes work?
- An enzyme has an ACTIVE SITE
- The molecule must fit exactly into part of the enzyme called the active site
- Different organisms have different temps that their enzymes work best
- If the body temp is higher then 40oc the active site DENATURES and the molecule can no longer fit
- When the enzymes get to hot, the rate of reaction falls to 0.
- PH also affects the enzymes. Every enzyme has an OPTIMUM PH at which it works best
- MAKING ENZYMES
- MRS GREN
- All chemical reactions take place in cytoplasm
- Untitled
- Untitled
- All chemical reactions take place in cytoplasm
- PHOTOSYNTHESIS
- Plants trap energy and use it to make all the molecules they need for growth
- Sugars, starch, enzymes and chlorophyll
- Chemical reaction
- GLUCOSE can be converted into starch for storage or cellulose to make new cell walls
- Plants trap energy and use it to make all the molecules they need for growth
- Untitled
- DIFFUSION
- Movement from a high concentration to a low concentration
- Passive process (doesn't need energy)
- Life processes
Comments
No comments have yet been made