Q.1
While scanning for similarities in motifs, how regular expressions’ techniques work?
  • a) It represents a sequence family by a string of characters and further compares them
  • b) An algorithm similar to dynamic programming is used
  • c) Dot matrix analysis is used in this type of sequence analysis
  • d) Matrix analysis methods are used in this type
Q.2
Which of the following best defines regular expressions?
  • a) They are made up of terms, operators and modifiers
  • b) They describe string or set of strings to find matching patterns
  • c) They are strictly restricted to alignment and corresponding score
  • d) They consist of set of rules for the connotations of various amino acid residues
Q.3
In regular expressions, which of the following pair of pattern is wrongly matched with its significance?
  • a) [ ] – Or
  • b) { } – Not
  • c) ( ) – Repeats
  • d) Z – Any
Q.4
In terminologies related to regular expressions which of the following is false about terms and operators?
  • a) Terms are strings or substrings
  • b) Operators combine terms and expressions
  • c) Operators do not have precedence
  • d) Operators have precedence like arithmetic operators
Q.5
In regular expressions, which of the following pair of pattern is wrongly matched with its significance?
  • a) ‘-’ – separator
  • b) < – N-terminal
  • c) > – C-terminal
  • d) ‘>>’ – end
Q.6
Emotif uses which databases for alignment of sequences?
  • a) BLOCKS and PRINTS databases
  • b) PROSITE
  • c) BLOCKS
  • d) PRINTS
Q.7
While analysing motif sequences, what is the major disadvantageous feature of PROSITE?
  • a) The database constructs profiles to complement some of the sequence patterns
  • b) The functional information of these patterns is primarily based on published literature
  • c) Some of the sequence patterns are too short to be specific
  • d) Lack of specificity about probability and variation and relation between them
Q.8
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
  • b) the rule of matching is based on observations, not actual assumptions
  • c) with the more relaxed matching, there is increase of the noise level and false positives
  • d) the rule of matching is based on assumptions not actual observations
Q.9
Which of the following is not a characteristic of exact matches in regular expression?
  • a) There must be a strict match of sequence patterns
  • b) Any variations in the query sequence from the predefined patterns are not allowed
  • c) Provide more permissive matching by allowing more flexible matching of residues of similar biochemical properties
  • d) Searching a motif database using this approach results in either a match or non-match
Q.10
What does this representation mean- R.L.[EQD]?
  • a) An arginine- Amino acid- Leucine- Amino acid- Either Apartic acid, glutamic acid or glutamine
  • b) An arginine- Leucine- Either Apartic acid, glutamic acid or glutamine
  • c) An arginine- Leucine- Amino acid- Either Apartic acid, glutamic acid or glutamine
  • d) An arginine- Leucine- Apartic acid and glutamic acid and glutamine
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