Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How can one determine the similarity between two biological sequences such as DNA strings?

### Response:
One way to determine the similarity between two biological sequences is to use a dynamic programming algorithm such as Smith-Waterman or Needleman-Wunsch. These algorithms compare the sequences of biological data and calculate the similarity score based on the number of similar characters or elements between the sequences.