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Enzymes

Quick Review. We've discussed:Food

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Enzymes

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    1. Enzymes Molecular Biology Sumner HS Created by Mr. woodbury, Modified by Mrs. Slater

    2. Quick Review We’ve discussed: Food & Energy (Potential & Kinetic) Energy Transformations The Laws of Thermodynamics

    3. Tell me how... ...you would start a camp fire? Would the fire start without a “spark?” ...you would build a house? Does the lumber cut itself or nail itself together? You need energy and tools.

    4. Remind me... What is the job of a lysosome? Does it do building or breaking reactions? What is the job of the ribosome? Does it do building or breaking reactions?

    5. Essential to life Enzymes Are a group of proteins They make chemical reactions (rearranging molecules) happen more easily. Takes less energy to start reaction Brings pieces together to be worked on. Isn’t changed in the reaction.

    6. Common Enzymes Amylase Lactase DNA & RNA polymerase DNA helicase

    7. Enzyme Features Have a specific shape that fits closely to one or more specific molecules “Lock and key” Can help with different reactions Break down Build up Their activity can change depending on cell conditions.

    8. Enzyme benefits Make some reactions possible that wouldn’t happen on their own. Make reactions more efficient Less energy Happen faster Can be used over and over

    9. Enzymes in a Cell Active sites: http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_enzymes_work.html Enzyme interactions (or not) with active sites: http://www.kscience.co.uk/animations/anim_2.htm

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