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This video can be found on my youtube channel.
http://www.youtube.com/user/Nanowise

Biology:
OB3a Test food for Startch 00:00 - 1:06

OB3b Test a food for sugar 1:07 - 2:11

OB3c Test a food for fat 2:14 - 3:10

OB3d Test a food for protein 3:11 - 4:55

OB5 Convert Chemical energy in food into heat energy 4:58 - 6:50

OB8 The action of enzyme amylase 6:51 - 7:02 Less