1) Write a regular expression that matches DNA. Write a regular expression that matches protein. Write a regular expression that matches characters that are duplicated in sequence. Write a regular expression that matches two duplicated words.

2) Parse the self-BLAST report generated in the class and report all matches that occur between non-identical sequence identifiers. Report all the matches that are more than 95% identical. Report all the matches on chromosome 2. 

3) Write a function that calculates the melting temperature of a primer. Use 2C for GC pairs and 1C for AT.