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In sequence alignment by BLAST, the second step is to search a sequence database for the occurrence of these words.

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In sequence alignment by BLAST, the second step is to search a sequence database for the occurrence of these words.

(a) True

(b) False

I got this question in my homework.

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

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Correct choice is (a) True

The explanation: This step is to identify database sequences containing the matching words. The matching of the words is scored by a given substitution matrix. A word is considered a match if it is above a threshold.

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