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Enzymes A review of how they work. Generate a definition of Enzymes. Proteins that promote specific rxns in cells by lowering activation energy required to start a rxn. How do enzymes work?. Lower activation energy increase speed of metabolic rates Break down….build up???.

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Presentation Transcript
generate a definition of enzymes
Generate a definition of Enzymes
  • Proteins that promote specific rxns in cells by lowering activation energy required to start a rxn.
how do enzymes work
How do enzymes work?
  • Lower activation energy
  • increase speed of metabolic rates
  • Break down….build up???
induced fit model
Induced fit model
  • Enzymes are specific
  • http://www.phschool.com/science/biology_place/labbench/lab2/induced.html
  • http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_enzymes_work.html
what happens after an enzyme does its job
What happens after an enzyme does its job?
  • Required in small amounts because as they work, not consumed.
factors that affect how enzymes work
Factors that affect how enzymes work?
  • Temperature
  • pH
  • Amount of substrate available
brainstorm of enzymes
Brainstorm of Enzymes
  • Saliva
  • Stomach
  • Nervous system: AcHase
  • Milk products
  • Papaya fruit
  • Unprocessed fruits
  • Kiwi: actiniclin
  • Soybeans (lipoxygenase)
  • Fireflies (luciferase)
  • Pineapples (bromelain)
  • Potatoes
  • Egg whites
  • Turnips (peroxidase)
  • Tears
  • Yeast (sucrase)
  • Lactase
  • Onions
  • detergents
how do you know enzymes are working
How do you know “enzymes” are working?

http://www.enetez.com/images/default/for_sale.jpg

challenge
Challenge
  • Design an experiment that will test the effectiveness of an enzyme on the protein gelatin.
  • Stipulations
    • Experiment will be performed in class period
    • conduction is totally designed by experimenters
    • Enzyme will be proteases (source: detergent)
    • Data collection must be qualitative and quantitative
  • Review scoring guide for how you will be graded
materials
materials
  • Test tubes
  • Petri dishes
  • gelatin
  • Water
  • Detergent (u supply)
  • Ruler
  • Straws
  • Sharpie/wax pens
exit slip
Exit slip
  • List of materials
  • Independent variable
  • Dependent variable
  • Constants
  • Control
  • Experimental (treatment group)
  • What are you measuring
http www2 visalia k12 ca us eldiamante science biology taters enzyme mc htm
http://www2.visalia.k12.ca.us/eldiamante/science/biology/taters/enzyme_mc.htmhttp://www2.visalia.k12.ca.us/eldiamante/science/biology/taters/enzyme_mc.htm