--- a
+++ b/retrieve_genome_sequence.py
@@ -0,0 +1,17 @@
+from Bio import Entrez
+
+def retrieve_genome_sequence(genome_id):
+    Entrez.email = 'your_email@example.com'  # Set your email address here
+    handle = Entrez.efetch(db='nucleotide', id=genome_id, rettype='fasta', retmode='text')
+    record = handle.read()
+    handle.close()
+    return record
+
+# Example usage
+genome_id = 'NC_045512'  # Replace with the actual genome ID
+sequence = retrieve_genome_sequence(genome_id)
+
+# Output the DNA sequence in a markdown code block
+print("```")
+print(sequence)
+print("```")