Answer:
Five variations od BLAST are as following:-
Explanation:
BLASTP - Searches a protein database with a protein sequence.
BLASTX - This program searches protein database using a translated nucleotide sequence.
TBLASTX - Searches DNA databases using a protein query.
BLASTN -Searches a nucleotide sequence against DNA database.
TBLASTN - Searches nucleotide sequence to a DNA database.