Counting DNA Nucleotides (updated)

Updated to use the with statement for file handling.  This ensure that
files will close properly, and it's more Pythonic.
Transcribing DNA into RNA (updated)

Updated to use the with statement for file handling.  This ensures that
files will close properly, and it's more Pythonic.
Complementing a Strand of DNA (updated)

Updated to use the with statement for file handling.  This ensures that
files will close properly, and it's more Pythonic.
Rabbits and Recurrence Relations (updated)

Updated to use the with statement for file handling.  This ensures that
files will close properly, and it's more Pythonic.
Computing GC Content (updated)

Updated to use the with statement for file handling.  This ensures that
files will close properly, and it's more Pythonic.
Counting Point Mutations (updated)

Updated to use the with statement for file handling.  This ensures that
files will close properly, and it's more Pythonic.