Programming help need to write arrays

timer Asked: Mar 1st, 2016

Question description

Given the amino acid sequence of a polypeptide: Phe, Val, Asn, Gln, His, Leu, Cys, Gly, Ser; perform the following tasks with a Perl program: 1. Define an array that contains the amino acids in the right order (use the three letters notation, as above). Print it in one line. 2. Determine the number of amino acids in the polypeptide and print it. 3. Add the amino acid "His" to the end of the polypeptide (use the "push" function). Print the resulting array in one line. 4. Create a "mutation": replace "Gly" with "Asp" (have your program look for Gly by using a loop and replace it with Asp if found). Print the resulting array. 5. Ask the user to enter a number between 1 and the number of amino acids in the polypeptide, and print the amino acid in that position (e.g. if the user enters "4" the program should print "Gln".) 6. Create an inversion: get two positions in the sequence from the user and invert the sequence of the amino acids between them. For example, if the user enters 3 and then 6, the program should replace Asn, Gln, His, Leu with Leu, His, Gln, Asn. (Using the "reverse" function). Print the result. 7. Create a string that will contain the amino acid sequence of the resulting polypeptide, in the format Phe-Val-Asn... (use string concatenation inside a loop. Make sure not to leave a "-" before the first amino acid or after the last one). Print that string

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