In modern protein biosensors, which synthetic molecules have become the preferred recognition element over antibodies due to their greater stability and lower production cost?
- Peptide nucleic acids (PNAs)
- Aptamers
- Monoclonal fragments
- Ribozymes
Answer: Aptamers
Aptamers are short synthetic strands of DNA or RNA that bind to specific target proteins with high selectivity; they are cheaper and more stable than antibodies since they are produced entirely in the laboratory without biological systems.