Proteins are among the four basic biomolecules, others being, carbohydrates, lipids, and nucleic acids.
Proteins are complex, organic compounds composed of many amino acids linked together through peptide bonds and cross-linked between chains by sulfhydryl bonds, hydrogen bonds and van der Waals forces.
The study island answer is "Remediating the mines keeps the contaminants from entering a watershed."
Explanation:
Many contaminants, particularly heavy metals, pollute the area around abandoned mines. If these contaminants enter the watershed, they can kill many organisms that live in that environment.
