Answer:
Post-translational modification, alternative splicing, DNA mutations
Explanation:
The diversity of the proteome can occur at different levels of biological processes:
1. During DNA replication yielding DNA mutations.
2. At the mRNA level in Alternative Splicing.
3. After translation on amino acid molecules including addition of different types of sugars (Glycosylation). This is post-translational modification.
Https://www.ncbi.nlm.nih.gov/books/NBK10039/
Answer:
There is more than one codon that can specify most amino acids, therefore you never know which one was used for a particular protein, unless you can look at the DNA or RNA sequence.
