Which of the following is correct for the utilization of DCC (dicyclohexylcarbodiimide) in solid phase synthesis? It reversibly protects the free carboxyl group of the amino acid being added to the growing polypeptide chain It activates the free carboxyl group of the amino acid being added toward nucleophilic attack by the growing polypeptide chain None of these are correct It reversibly protects the free amino group of the amino acid being added to the growing polypeptide chain It activates the free carboxyl group of the growing polypeptide chain toward nucleophilic attack by the incoming amino acid