Final answer:
Synthetic oligonucleotide chains can be made up to about 100 nucleotides in length with current technology, but longer chains may have increased errors or lower yields.
Step-by-step explanation:
Oligonucleotides can be chemically synthesized by a computer-controlled machine to a certain length, and with current technology, these synthetic oligonucleotides can typically be made up to lengths of about 100 nucleotides. However, it's important to note that as the length increases, the efficiency and accuracy of the synthesis can decrease, potentially leading to errors or lower yields. Advances in synthesis technology may change this limitation over time.