Final answer:
It is false that non polar amino acids are usually found on the outside of proteins; they are commonly located in the interior, while the polar and charged amino acids tend to be on the surface due to their interaction with the watery environment.
Step-by-step explanation:
The statement that non polar amino acids tend to be found on the outside of proteins is false. Amino acids can be classified as nonpolar, polar but uncharged, negatively charged, or positively charged based on their distinctive side chains. Nonpolar amino acids, which are hydrophobic, are typically found in the interior of proteins due to their ability to avoid water, which makes up the cellular environment. On the other hand, polar and charged amino acids with hydrophilic properties are found on the surface of proteins where they can interact with the watery cellular environment. These interactions are crucial for the protein's function and for its proper folding into its three-dimensional structure.