Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O...

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Enzymes Chapter 6.3 page165

Transcript of Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O...

Page 1: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Enzymes

Chapter 6.3 page165

Page 2: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Enzyme Lab

• Catalase• Blood & Liver

• H2O2

• Toxic

• H2O2 +catalase=

• H2O + O2

Page 3: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Properties of Enzymes

• Proteins• Catalysts• Speed

reactions• Work fast• Denature at

high temp

Page 4: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Enzyme-Substrate complex

Substrate

Active site = where the substrate( reaction molecule)connects toenzyme

Active Site

Enzyme

Page 5: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Enzymes remain unchanged!

• Enzymes are not used up

• No more substrate = end to the reaction

• Synthesis or Decomposition reactions

Before

After

Page 6: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Lock & Key Model

•One enzyme

•for every substrate

•unique fit

Substrate

Enzyme

Page 7: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

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

Page 8: Enzymes Chapter 6.3 page165 Enzyme Lab Catalase Blood & Liver H 2 O 2 Toxic H 2 O 2 +catalase= H 2 O + O 2.

Enzymes are temperature dependent…...

0102030405060708090

10oC

20 37 40

•Most at body temperature

•37oC•Denature at high temperatures


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