Question

Which of the following is not correct about FASTA?

(a) Its stands for FAST ALL

(b) It was in fact the first database similarity search tool developed, preceding the development of BLAST

(c) FASTA uses a ‘hashing’ strategy to find matches for a short stretch of identical residues with a length of k

(d) The string of residues is known as blocks

The question was posed to me in my homework.

This interesting question is from FASTA in chapter Database Similarity Searching of Bioinformatics

Answer 1

Correct answer is (d) The string of residues is known as blocks

The explanation: The string of residues is known as ktuples or ktups, which are equivalent to words inBLAST, but are normally shorter than the words. Typically, a ktup is composed of two residues for protein sequences and six residues for DNA sequences.