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Transkript

Practice

  • What is the difference between enzymes?
  • What is a substrate?

Activation Energy

Function

  • All chemical reactions need energy to start them
  • The energy to start a chemical reaction is called Activation Energy
  • The difference between enzymes is their shape
  • Lock and Key Model
  • Lock = enzyme
  • Key = substrate
  • Substrates are always the reactants

Activation Energy & Enzymes

  • Enzymes catalyze chemical reactions by lowering the activation energy needed

Practice

  • What does catalyze mean?

Practice

  • What is activation energy?
  • How do enzymes speed up chemical reactions?

Enzyme Function

  • Enzymes control chemical reactions in your body
  • Normal chemical reactions are slow
  • Enzymes catalyze (speed up) the reactions
  • Example: enzymes speed up digestion so it takes 2 days instead of 200 days

Practice

Denaturing Enzymes

  • Draw the chemical equation for: Starch turns into sugar
  • Draw the chemical equation for: Sugar turns into water and Carbon dioxide?
  • Homeostasis = maintaining a stable internal environment
  • 98.6 degrees F
  • 7.4 pH
  • Change either of these and enzymes will denature (slow down, and stop = you die)

Chemical Reaction

Practice

  • What does denature mean?
  • Why is it bad to denature enzymes?
  • Atoms are rearranged
  • H + O  H2O

Reactants  Products

(Substrate)

Enzymes

Category

Quick Write

  • Enzymes are Proteins
  • Proteins = tools
  • 1 tool for every job
  • 1 protein for every job
  • What is/are the monomer(s) for lipids?
  • What are the monomer and polymer for proteins?
  • What are some functions of proteins?

Learning Goal 5

Closure Quiz

  • What is a substrate?
  • Draw the toothpickase reaction.
  • What do enzymes do?
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