Question

Write a program that prompts the user to enter an oligonucleotide sequence, such as TATGAGCCCGTA.

Answer 1

Answer:

Explanation:

The following code is written in Python. It continues looping and asking the user for an oligonucleotide sequence and as long as it is valid it outputs the reverse complement of the sequence. Otherwise it exits the loop

letters = {'A', 'C', 'G', 'T'}

reloop = True

while reloop:

   sequence = input("Enter oligonucleotide sequence: ")

   for x in sequence:

       if x not in letters:

           reloop = False;

           break

   if reloop == False:

       break

   newSequence = ""

   for x in sequence:

       if x == 'A':

           newSequence += 'T'

       elif x == 'T':

           newSequence += 'A'

       elif x == 'C':

           newSequence += 'G'

       elif x == 'G':

           newSequence += 'C'

   print("Reverse Complement: " + newSequence)