Final answer:
The genetic code can be expanded to include unnatural amino acids, breaking the previous understanding of a fixed genetic code, which has enabled significant advancements in protein engineering and synthetic biology.
Step-by-step explanation:
Regarding the question of peptide discovery with a radically altered genetic code, it's important to understand that the standard genetic code is redundant, with multiple codons sometimes encoding the same amino acid. Advanced research has now shown that the genetic code can be expanded to include unnatural amino acids.
True or False: One codon can encode for more than one amino acid. This statement is false; each codon specifies only one amino acid, but an amino acid can be specified by more than one codon due to the degeneracy of the genetic code.
Research by scholars such as Hartman et al. and Wang et al. demonstrates that the genetic code is not fixed and can be manipulated to include non-standard amino acids, which has significant implications for protein engineering and synthetic biology.