Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the...
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Transcript of Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the...
![Page 1: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/1.jpg)
Enzymes
B3a
![Page 2: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/2.jpg)
OBJECTVES
Key Objective• Describe the factor affecting the function of enzymes
• State the function of enzymes (D)• Describe how changing temperature and pH will change
the rate of reaction of an enzyme-catalysed reaction (C)• Explain the specificity of enzymes in terms of the ‘lock and
key’ mechanism (B)• Explain how enzyme activity is affected by pH and
temperature (A)• Link the effect of temperature and pH on the active site to
the enzyme’s ability to function (A*)
![Page 3: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/3.jpg)
STARTER
• What are enzymes?• What is their function?• Give an example of a specific enzyme.• What happens to the rate of an enzyme-
catalysed reaction as temperature increases?• What is the name of the model used to describe
how enzymes work?• What happens to enzymes as temperature or pH
increases?• What effect does this have on the reaction?• Why?
![Page 4: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/4.jpg)
STARTER• What are enzymes?
– Proteins or biological catalysts• What is their function?
– To speed up the rate of a chemical reaction• Give an example of a specific enzyme.
– Carbohydrase, Lipase, Protease, Catalase• What happens to the rate of an enzyme- catalysed reaction as
temperature increases?– Rises to a peak and then drops rapidly
• What is the name of the model used to describe how enzymes work?– Lock & Key theory
• What happens to enzymes as temperature or pH increases?– Denature (twist out of shape)
• What effect does this have on the reaction?– Reaction slows then stops or stops immediately
• Why?– Substrates no longer fit into the active site
How did you do?1-2 marks = D3-4 marks = C5 marks = B6-7 marks = A8 marks = A*
![Page 5: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/5.jpg)
![Page 6: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/6.jpg)
Why do we need to break down food?
Digestive system Blood
![Page 7: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/7.jpg)
Digestive enzymes are the chemicals that break large insoluble food molecules into smaller soluble molecules.
Digestive enzymes are classified by the type of food that they affect, so there are three main types:
Different types of digestive enzymes
carbohydrase – breaks carbohydrate into smaller sugars.
protease – breaks protein into amino acids.
lipase – breaks fat into fatty acids and glycerol.
![Page 8: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/8.jpg)
![Page 9: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/9.jpg)
OBJECTVES
Key Objective• Describe the factor affecting the function of enzymes
• State the function of enzymes (D)• Describe how changing temperature and pH will change
the rate of reaction of an enzyme-catalysed reaction (C)• Explain the specificity of enzymes in terms of the ‘lock and
key’ mechanism (B)• Explain how enzyme activity is affected by pH and
temperature (A)• Link the effect of temperature and pH on the active site to
the enzyme’s ability to function (A*)
![Page 10: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/10.jpg)
How enzymes work
![Page 11: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/11.jpg)
The lock and key model
![Page 12: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/12.jpg)
Factors affecting enzyme action
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Structure of an enzyme molecule
• Enzymes are proteins made up on long chains of amino acids.
• These long chains fold to produce a special shape which is vital for the enzyme‘s function.
Active Site
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OBJECTVES
Key Objective• Describe the factor affecting the function of enzymes
• State the function of enzymes (D)• Describe how changing temperature and pH will change
the rate of reaction of an enzyme-catalysed reaction (C)• Explain the specificity of enzymes in terms of the ‘lock and
key’ mechanism (B)• Explain how enzyme activity is affected by pH and
temperature (A)• Link the effect of temperature and pH on the active site to
the enzyme’s ability to function (A*)
![Page 15: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/15.jpg)
PLENARY
• Draw cartoons (with descriptions) showing how enzymes work and how temperature affects their function.
• Include as much information from the lesson as you think is appropriate. – (Tip: think about the objectives!)
![Page 16: Enzymes B3a. OBJECTVES Key Objective Describe the factor affecting the function of enzymes State the function of enzymes (D) Describe how changing temperature.](https://reader036.fdocuments.in/reader036/viewer/2022081421/5697bf8e1a28abf838c8cd87/html5/thumbnails/16.jpg)
PLENARY
• Draw cartoons (with descriptions) showing how enzymes work and how temperature affects their function.
• Include as much information from the lesson as you think is appropriate. – (Tip: think about the objectives!)
How did you do?Have you…• Stated/shown what enzymes do? (D)• Described how temperature and pH affects the rate of enzyme activity? (C)• Shown that enzymes are specific? (B)• Explained how enzyme activity is affected by temperature? (A)• Explained how the active site is affected by high temperatures and what this means for the enzyme’s ability to work? (A*)