A polypeptide contains $n$ amino acids. How many peptide bonds and R groups (side chains) are present in this polypeptide?
- A$n - 1$ peptide bonds and $n - 1$ R groups
- B$n - 1$ peptide bonds and $n$ R groups
- C$n$ peptide bonds and $n - 1$ R groups
- D$n$ peptide bonds and $n$ R groups