Final answer:
The statement that amino acids within a protein can be charged or uncharged is true. Amino acids are classified into neutral, acidic, and basic groups, with charged amino acids usually found on the protein's surface.
Step-by-step explanation:
The statement that amino acids within a protein can be charged or uncharged is true. Amino acids are the building blocks of proteins and can be broadly classified into three groups based on the charge of their side chains: neutral, acidic, and basic amino acids. Neutral amino acids have side chains that do not carry a charge. Acidic amino acids have side chains with a negative charge, and basic amino acids have side chains with a positive charge. Within a protein, the polar and charged amino acids are typically found on the surface of the protein, while the non-polar amino acids tend to be located in the interior, affecting the protein's structure and function.