enzymes chapter 6.3 page165 enzyme lab catalase blood & liver h 2 o 2 toxic h 2 o 2 +catalase= h...
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Enzymes
Chapter 6.3 page165
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Enzyme Lab
• Catalase• Blood & Liver
• H2O2
• Toxic
• H2O2 +catalase=
• H2O + O2
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Properties of Enzymes
• Proteins• Catalysts• Speed
reactions• Work fast• Denature at
high temp
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Enzyme-Substrate complex
Substrate
Active site = where the substrate( reaction molecule)connects toenzyme
Active Site
Enzyme
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Enzymes remain unchanged!
• Enzymes are not used up
• No more substrate = end to the reaction
• Synthesis or Decomposition reactions
Before
After
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Lock & Key Model
•One enzyme
•for every substrate
•unique fit
Substrate
Enzyme
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Enzymes are pH specific
• Different enzymes• Different body areas• Different optimum pH• Examples: Stomach= acid pH Mouth= basic pH 0
10
20
30
40
50
60
70
80
90
100
pH 2 pH 4 Ph 6 pH 8
Stomach
Blood
Mouth
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Enzymes are temperature dependent…...
0102030405060708090
10oC
20 37 40
•Most at body temperature
•37oC•Denature at high temperatures