Bioinformatics Mcqs

Page No. 25

The second step in FASTA is to narrow down the high similarity regions between the two sequences.


aTrue


bFalse


ceither true and false


dnone of the mentioned


View Answer True

The positional difference for each word between the two sequences is obtained by ________ the position of the ______ sequence from that of the _______ sequence and is expressed as the offset.


asubtracting, second, first


badding, second, first


cadding, first, second


dsubtracting, first, second



The first step in FASTA alignment id to arrange the sequences in matrices’ rows and columns in order to be analyzed.


aTrue


bFalse


ceither true and false


dnone of the mentioned


View Answer False

Which of the following is not correct about FASTA?


aIts stands for FAST ALL


bIt was in fact the first database similarity search tool developed, preceding the development of BLAST


cFASTA uses a ‘hashing’ strategy to find matches for a short stretch of identical residues with a length of k


dThe string of residues is known as blocks



The initiation of FASTA format has ____ symbol.


a>


b<


c/


d*


View Answer >

The gapped portion in the diagonals represents matches in FASTA.


aTrue


bFalse


ceither true and false


dnone of the mentioned


View Answer False

FASTA is derived from logic of the dot plot.


aTrue


b False


ceither true and false


dnone of the mentioned


View Answer True

BLAST often produces several short HSPs rather than a single aligned region.


aTrue


bFalse


ceither true and false


dnone of the mentioned


View Answer True

BLAST might not find matches for very short sequences.


aTrue


bFalse


ceither true and false


dnone of the mentioned


View Answer True

Which of the following is not a benefit of BLAST?


aHandling of gaps


bSpeed


cMore sensitive


dStatistical rigor


View Answer Handling of gaps

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