Proteins As Enzymes: Saltine Crackers and Amylase A protein is a
large molecule found in cells. The unique structure of a protein
determines its function. Enzymes are proteins that speed up
chemical reactions, helping transform one substance into
another. The enzyme amylase, found in saliva, changes starch
into sugar. In this activity you will experience how this
transformation occurs. One-half of an unsalted saltine cracker
Small paper cup of water - Remove any gum or candy you may have
in your mouth and drink the cup of water. - Place the saltine in
your mouth, but do not chew it. Just hold it in your mouth. -
Note any changes in taste you experience over the next few
minutes. - What did the saltine taste like when you first put it
in your mouth? - Did you experience any change in taste over the
time you held the saltine in your mouth? Explain. - Discuss what
you think was happening in your mouth while you held the
saltine. - Answers will vary, but students should not indicate
there was any sweet flavor to