Final answer:
The correct statement about amino acids is that some have hydrophilic and others have hydrophobic side chains. These side chains affect the protein's structure and function.
Step-by-step explanation:
Out of the given statements about amino acids, the correct statement is: 'some amino acids have hydrophilic side chains and some have hydrophobic side chains'. Amino acids are the building blocks of proteins and have various side chains that can be nonpolar, polar but uncharged, positively charged, or negatively charged.
These side chains significantly influence the protein's structure and function. The sequence of these amino acids forms the primary structure of a protein, while local folding into elements like alpha-helices and beta-sheets represents the secondary structure. The tertiary structure is the overall 3D structure of a single protein molecule, and the quaternary structure is formed when multiple polypeptides join together.