1) Write a regular expression that matches protein sequences.

2) Using the substitution operator, write a regular expression that replaces whitespace with a single space.
(for example, "foo    bar       batz" would become "foo bar batz")

3) Write a script that reads the m8 output of a BLAST run. Output the lines that have an identity of 100%.  

4) Add a command line switch to the script from exercise 1 that allows the user to specify the cutoff for the percent values (for example, -p 80 would list percent values 80 and above). (Hint: use Getopt::Std for this)

5) Write a simple script that determines all the prime numbers between 1 and a maximum value, which is user settable through a command line parameter. Print all the prime numbers to STDOUT at the end of the program. Hint: Use the sieve of Eratosthenes. 

6) Install bioperl using cpan.