Write a Python script that reads a DNA sequence from a file, reverse
transcribes it into an mRNA, and then translates the mRNA into a chain of
amino acids. Your script should have a function to reverse translate the
DNA sequence into RNA and a separate function to translate the mRNA into
an amino acid sequence.

For example if the file contains 

>human
TCTGGCGGCGTACCTCAT

then the output should be MRYAAR. The intermediate reverse transcribed 
sequence is AUGAGGUACGCCGCCAGA which translates into MRYAAR.

Submit a hardcopy in class on Sept 23rd