Of the following basic statements about protein (and amino acids) which three are not true?
1. The main function of amino acids is the synthesis of structural and functional proteins
2. Proteins can act as cell to cell signalers (hormones and cytokines), molecular transporters, enzymes, neurotransmitters, and many other things.
3. There are 20 amino acids.
4. There are 9 amino acids that are considered essential in the diet.
5. The body is able to store large amounts of amino acids for later use.
6 All hormones are based on amino acids.
7. Amino acids can be classified based on their polarity.
8. Amino acids can also be classified according to their net charge.
8. The word "protein" comes from the Greek word proteos, meaning primary or taking first place.
9. Protein digestion begins in the stomach.
10. Leucine is the only amino acid that is completely oxidized in the muscle for energy.