Bioinformatics Mcqs

Page No. 2

What does this representation mean- R.L.[EQD]?


aAn arginine- Amino acid- Leucine- Amino acid- Either Apartic acid, glutamic acid or glutamine

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b An arginine- Leucine- Either Apartic acid, glutamic acid or glutamine

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cAn arginine- Leucine- Amino acid- Either Apartic acid, glutamic acid or glutamine

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dAn arginine- Leucine- Apartic acid and glutamic acid and glutamine

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.Which of the following is not a characteristic of exact matches in regular expression?


aThere must be a strict match of sequence patterns

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bAny variations in the query sequence from the predefined patterns are not allowed

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cProvide more permissive matching by allowing more flexible matching of residues of similar biochemical properties

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dSearching a motif database using this approach results in either a match or non-match

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Which of the following is not a characteristic of Fuzzy or approximate matches in regular expression?


a This method is able to include more variant forms of a motif with a conserved function

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bthe rule of matching is based on observations, not actual assumptions

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c with the more relaxed matching, there is increase of the noise level and false positives

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d the rule of matching is based on assumptions not actual observati

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While analysing motif sequences, what is the major disadvantageous feature of PROSITE?


aThe database constructs profiles to complement some of the sequence patterns

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bThe functional information of these patterns is primarily based on published literature

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cSome of the sequence patterns are too short to be specific

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dLack of specificity about probability and variation and relation between them

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Emotif uses which databases for alignment of sequences? a) BLOCKS and PRINTS databases


aBLOCKS and PRINTS databases

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bPROSITE

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cPROSITE

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dPRINTS

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In terminologies related to regular expressions which of the following is false about terms and operators?


aTerms are strings or substring

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bOperators combine terms and expressions

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cOperators do not have precedence

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dOperators have precedence like arithmetic operators

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In regular expressions, which of the following pair of pattern is wrongly matched with its significance?


a[ ] – Or

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b{ } – Not

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c ( ) – Repeats

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d Z – Any

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View Answer Z – Any

Which of the following best defines regular expressions?


aThey are made up of terms, operators and modifiers

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b They describe string or set of strings to find matching patterns

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c They are strictly restricted to alignment and corresponding score

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dThey consist of set of rules for the connotations of various amino acid residues

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While scanning for similarities in motifs, how regular expressions’ techniques work?


aIt represents a sequence family by a string of characters and further compares them

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b An algorithm similar to dynamic programming is used

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c Dot matrix analysis is used in this type of sequence analysis

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d Matrix analysis methods are used in this type

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Point out the wrong or irrelevant mathematical method in motif analysis.


aEnumeration

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bProbabilistic Optimization

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c Deterministic Optimization

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d Literature mining

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View Answer Literature mining

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