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MCQs

Total Questions : 100 | Page 3 of 10 pages
Question 21. A gene phylogeny only describes the evolution of a particular gene or encoded protein.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 22. Evolution of a particular sequence _______ correlate with the evolutionary path of the species.
  1.    does not
  2.    always
  3.    does not necessarily
  4.    invariably
 Discuss Question
Answer: Option C. -> does not necessarily
Answer: (c).does not necessarily
Question 23. To obtain a species phylogeny, phylogenetic trees from a variety of gene families need to be constructed.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 24. The species evolution is the ______ of evolution by _____ in a genome.
  1.    combined result, multiple genes
  2.    result, single genes
  3.    result, sole genes
  4.    distinct results, single gene
 Discuss Question
Answer: Option A. -> combined result, multiple genes
Answer: (a).combined result, multiple genes
Question 25. It is often desirable to define the root of a tree. There are two ways to define the root of a tree. One is to use an outgroup, which ______
  1.    is a sequence that is homologous to the sequences under consideration
  2.    is separated from those sequences at an early evolutionary time
  3.    is generally determined from independent sources of information
  4.    is generally determined from similar or related sources of information
 Discuss Question
Answer: Option D. -> is generally determined from similar or related sources of information
Answer: (d).is generally determined from similar or related sources of information
Question 26. Which of the following is incorrect statement about Character-based methods?
  1.    They are also called discrete methods
  2.    They are based directly on the sequence characters rather than on pairwise distances
  3.    They doesn’t count mutational events accumulated on the sequences
  4.    They may avoid the loss of information when characters are converted to distances
 Discuss Question
Answer: Option C. -> They doesn’t count mutational events accumulated on the sequences
Answer: (c).They doesn’t count mutational events accumulated on the sequences
Question 27. Which of the following is incorrect statement about Maximum Parsimony Method?
  1.    By cutting off the unnecessary variables, model development may become difficult, and there may be more chances of introducing inconsistencies, ambiguities, and redundancies, hence, the name Occam’s razor
  2.    In dealing with problems that may have an infinite number of possible solutions, choosing the simplest model may help to ‘cut off’ those variables that are not really necessary to explain the phenomenon
  3.    This method chooses a tree that has the fewest evolutionary changes or shortest overall branch lengths
  4.    It is based on a principle related to a medieval philosophy called Occam’s razor
 Discuss Question
Answer: Option A. -> By cutting off the unnecessary variables, model development may become difficult, and there may be more chances of introducing inconsistencies, ambiguities, and redundancies, hence, the name Occam’s razor
Answer: (a).By cutting off the unnecessary variables, model development may become difficult, and there may be more chances of introducing inconsistencies, ambiguities, and redundancies, hence, the name Occam’s razor
Question 28. Which of the following is incorrect statement about Building Work of MP tree?
  1.    It works by searching for all possible tree topologies and reconstructing ancestral sequences that require the minimum number of changes to evolve to the current sequences
  2.    Other than informative sites are non-informative, which are constant sites or sites that have changes occurring only once
  3.    Informative sites are the ones that can often be explained by a unique tree topology
  4.    Constant sites have the same state in all taxa and are quite useful in evaluating the various topologies
 Discuss Question
Answer: Option D. -> Constant sites have the same state in all taxa and are quite useful in evaluating the various topologies
Answer: (d).Constant sites have the same state in all taxa and are quite useful in evaluating the various topologies
Question 29. The unweighted method treats all mutations as equivalent.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 30. Because these ancestral character states are not known directly, multiple possible solutions may exist. In this case, the parsimony principle applies to choose the character states that result in a minimum number of substitutions.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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