1. Organic Reactions and Enzymes

2. Chemical Reactions
Changing of one set of chemicals into a new set of chemicals
A chemical change
Always involve the breaking of chemical bonds and/or the formation of new bonds
Examples:
CH4 + O2  CO2 + H2O (This is not balanced)
  2H2 + O2 2H2O

3. Homework out for stamping:
Warmup
Read about nucleic acids on page 48. Create a concept map for that short section, following a similar style as the concept maps we made in class on Wednesday.
Homework out for stamping:
Questions from secton 2-3
Conclusions and Analysis questions for McMush lab

4. Announcements/Reminders
Day to make up any missed/unfinished lab: Next Tuesday (9/22)
Lab books due next Wednesday (9/23)
Re-read course expectations AND SAFETY guidelines
Pen/pencil?
Spiral/lab notebook?
Dividers
Buddies
Clean-up

5. record the results, and then throw the paper in the garbage.
Finish McMush
Check your lipid test,
record the results, and then throw the paper in the garbage.

6. Energy in Reactions Reactions can release or absorb energy
Reactions that release energy (exothermic)can occur spontaneously, however, many need Activation energy
Activation energy is energy needed to get a reaction started

7. Energy in reactions cont.
Chemical reactions that absorb energy (endothermic) generally need much activation energy

8. Enzymes Biological catalysts
Catalysts; Speed up the reaction by lowering the activation energy.

9. Enzyme action
Enzymes provide a place when the things that need to react can be brought together
These reactants are know as substrates
Enzymes literally provide a place where the reactants can “fit”
When the reactions come in the enzyme changes shape and “works”

10. Homework Respond to the learning targets for unit one.
Find the document on my website if you can’t find yours.
My website: