Questions and answers for exam Preparation

MCQs

Total Questions : 100 | Page 10 of 10 pages

Question 91. In the final steps of the bootstrap method, the _____ the decay value, the _______ significant the original branches.

greater, less
greater, more
lesser, more
more, less

Discuss Question

Answer: Option B. -> greater, more
Answer: (b).greater, more

Question 92. The traditional use of phylogenetic analysis is to discover evolutionary relationships among species.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 93. Two more recent uses of phylogenetic analysis are to analyze ______ and to trace the evolutionary history of specific genes. Which of the following could not be the correct blank?

gene families
genomes
proteomes
physical separation methods

Discuss Question

Answer: Option D. -> physical separation methods
Answer: (d).physical separation methods

Question 94. Tracking the evolutionary history of individual genes in a group of species can reveal which genes have remained in a genome for a long time and which genes have been horizontally transferred between species.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 95. A common recommendation is to use at least two of the methods—maximum parsimony, distance, or maximum likelihood, for the analysis.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 96. A generalized expression of the r-value is ri calculated based on the following formula _______

ri = ∑dij + dj²
ri = ∑dij
ri = ∑dij + di
ri = ∑dij + dj

Discuss Question

Answer: Option B. -> ri = ∑dij
Answer: (b).ri = ∑dij

Question 97. The tree construction process is somewhat similar to that used UPGMA.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option B. -> False
Answer: (b).False

Question 98. Which of the following is untrue about the Fitch–Margoliash?

Method selects a best tree among all possible trees based on minimal deviation between the distances calculated in the overall branches in the tree and the distances in the original dataset
It starts by randomly clustering two taxa in a node
It starts by creating three equations to describe the distances
The method searches for some specific tree topologies

Discuss Question

Answer: Option D. -> The method searches for some specific tree topologies
Answer: (d).The method searches for some specific tree topologies

Question 99. Minimum evolution (ME) constructs a tree with a similar procedure, but uses a different optimality criterion that finds a tree among all possible trees with a minimum overall branch length. The optimality criterion relies on the formula S = ∑bi where bi is the (i)th branch length.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 100. Which of the following is untrue about the Optimality-Based Methods?

The clustering-based methods produce multiple trees as output
Optimality-based methods select a tree that best fits the actual evolutionary distance matrix
There is no criterion in judging how this tree is compared to other alternative trees
Optimality-based methods have a well-defined algorithm to compare all possible tree topologies

Discuss Question

Answer: Option A. -> The clustering-based methods produce multiple trees as output
Answer: (a).The clustering-based methods produce multiple trees as output