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Which of the following is not correct about BLAST?

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Which of the following is not correct about BLAST?

(a) The BLAST web server has been designed in such away as to simplify the task of program selection

(b) The programs are organized based on the type of query sequences

(c) The programs are organized based on the type of nucleotide sequences, or nucleotide sequence to be translated

(d) BLAST is not based on heuristic searching methods

I got this question in an interview.

My question is based upon Basic Local Alignment Search Tool (BLAST) in section Database Similarity Searching of Bioinformatics

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Correct choice is (d) BLAST is not based on heuristic searching methods

The explanation: BLAST and FASTA are based on heuristic searching methods. In addition, programs for special purposes are grouped separately; for example, bl2seq, immunoglobulin BLAST, and VecScreen, a program for removing contaminating vector sequences.

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