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Exercise 2.3.1

Note: This exercise won’t work yet due - install BioPython!

Retrieve a FASTA file named data/sample.fa using BioPython and answer the following questions:

How many sequences are in the file?
What are the IDs and the lengths of the longest and the shortest sequences?
Select sequences longer than 500bp. What is the average length of these sequences?
Calculate and print the percentage of GC in each of the sequences.
Write the newly created sequences into a FASTA file named long_sequences.fa.