20 + Mcqs in Forms Tree Representation Page 1 McqOptions

1.	In Jukes–Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____
A.	dAB = −(3/4) log[1 − (4/7)pAB]
B.	dAB = −(3/4) ln[1 − (5/3)pAB]
C.	dAB = −(3/4) log[1 − (4/3)pAB]
D.	dAB = −(3/4) ln[1 − (4/3)pAB]
Answer» E.

Discussion

2.	DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms.
A.	True
B.	False
Answer» B. False

Discussion

3.	Protein sequences can remain the same while the corresponding DNA sequences have more room for variation.
A.	True
B.	False
Answer» B. False

Discussion

4.	In many cases ______ sequences are preferable to ______ sequences because they are relatively ____ conserved.
A.	protein, nucleotide, less
B.	nucleotide, protein, less
C.	protein, nucleotide, more
D.	nucleotide, protein, more
Answer» D. nucleotide, protein, more

Discussion

5.	For studying the evolution of ________ divergent groups of organisms, one may choose either ______ nucleotide sequences, such as ribosomal RNA or protein sequences.
A.	less widely, slowly evolving
B.	more widely, slowly evolving
C.	more widely, rapidly evolving
D.	less widely, rapidly evolving
Answer» C. more widely, rapidly evolving

Discussion

6.	For unrooted trees, the number of unrooted tree topologies (NU) is ________
A.	NU = (2n− 5)!/2n−3(n− 5)!
B.	NU = (2n− 5)!/2n−3(n− 3)!
C.	NU = (2n− 5)!/2−2(n− 3)!
D.	NU = (2n− 5)!/2n(n− 3)!
Answer» C. NU = (2n− 5)!/2−2(n− 3)!

Discussion

7.	The number of rooted trees (NR) for n taxa is ______
A.	NR = (2n− 3)!/2n+2 (n− 2)!
B.	NR = (2n− 3)!/2n (n− 2)!
C.	NR = (2n− 3)!/2n−2 (n− 5)!
D.	NR = (2n− 3)!/2n−2 (n− 2)!
Answer» E.

Discussion

8.	Which of the following is an incorrect statement about Newick Format?
A.	It was designed to provide information of tree topology to computer programs without having to draw the tree itself
B.	In this format, trees are represented by taxa excluded in nested parentheses
C.	In this linear representation, each internal node is represented by a pair of parentheses
D.	For a tree with scaled branch lengths, the branch lengths in arbitrary units are placed immediately after the name of the taxon separated by a colon
Answer» C. In this linear representation, each internal node is represented by a pair of parentheses

Discussion

9.	PROTEIN_SEQUENCES_CAN_REMAIN_THE_SAME_WHILE_THE_CORRESPONDING_DNA_SEQUENCES_HAVE_MORE_ROOM_FOR_VARIATION.?$
A.	True
B.	False
Answer» B. False

Discussion

10.	In Jukes‚Äö√Ñ√∂‚àö√ë‚àö¬®Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____$#
A.	d<sub>AB</sub> = ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†(3/4) log[1 ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† (4/7)p<sub>AB</sub>].
B.	d<sub>AB</sub> = ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†(3/4) ln[1 ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† (5/3)p<sub>AB</sub>].
C.	d<sub>AB</sub> = ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†(3/4) log[1 ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† (4/3)<sub>pAB</sub>].
D.	d<sub>AB</sub> = ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†(3/4) ln[1 ‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† (4/3)<sub>pAB</sub>].
Answer» E.

Discussion

11.	DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms.$
A.	True
B.	False
Answer» B. False

Discussion

12.	In many cases, ______ sequences are preferable to ______ sequences because they are relatively ____ conserved?
A.	protein, nucleotide, less
B.	nucleotide, protein, less
C.	protein, nucleotide, more
D.	nucleotide, protein, more
Answer» D. nucleotide, protein, more

Discussion

13.	For studying the evolution of ________ divergent groups of organisms, one may choose either ______ nucleotide sequences, such as ribosomal RNA or protein sequences?
A.	less widely, slowly evolving
B.	more widely, slowly evolving
C.	more widely, rapidly evolving
D.	less widely, rapidly evolving
Answer» C. more widely, rapidly evolving

Discussion

14.	Which of the following is incorrect statement about Molecular Markers?
A.	For studying very closely related organisms, protein sequences are preferred
B.	The decision to use nucleotide or protein sequences depends on the purposes of the study
C.	For constructing molecular phylogenetic trees, one can use either nucleotide or protein sequence data
D.	The decision to use nucleotide or protein sequences depends on the properties of the sequences
Answer» B. The decision to use nucleotide or protein sequences depends on the purposes of the study

Discussion

15.	It can be computationally very demanding to find a true phylogenetic tree when the number of sequences is large.
A.	True
B.	False
Answer» B. False

Discussion

16.	For unrooted trees, the number of unrooted tree topologies (NU) is ________
A.	N<sub>U</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!/2<sup>n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†3</sup>(n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!
B.	N<sub>U</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!/2<sup>n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†3</sup>(n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)!
C.	N<sub>U</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!/2<sup>‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†2</sup>(n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)!
D.	N<sub>U</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!/2<sup>n</sup>(n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)!
Answer» C. N<sub>U</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!/2<sup>‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†2</sup>(n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)!

Discussion

17.	The number of rooted trees (NR) for n taxa is ______
A.	N<sub>R</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)! /2<sup>n+2</sup> (n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 2)!
B.	N<sub>R</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)! /2<sup>n</sup> (n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 2)!
C.	N<sub>R</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)! /2<sup>n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†2</sup> (n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 5)!
D.	N<sub>R</sub> = (2n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 3)! /2<sup>n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â†2</sup> (n‚Äö√Ñ√∂‚àö‚Ä†‚àö‚â† 2)!
Answer» E.

Discussion

18.	Sometimes a tree-building method may result in several equally optimal trees. A consensus tree can be built by showing the commonly resolved bifurcating portions and collapsing the ones that disagree among the trees, which results in a polytomy.
A.	True
B.	False
Answer» B. False

Discussion

19.	Which of the following is incorrect statement about Newick Format?
A.	It was designed to provide information of tree topology to computer programs without having to draw the tree itself
B.	In this format, trees are represented by taxa excluded in nested parentheses
C.	In this linear representation, each internal node is represented by a pair of parentheses
D.	For a tree with scaled branch lengths, the branch lengths in arbitrary units are placed immediately after the name of the taxon separated by a colon
Answer» C. In this linear representation, each internal node is represented by a pair of parentheses

Discussion

20.	Which of the following is incorrect statement?
A.	In a phylogram, the branch lengths represent the amount of evolutionary divergence
B.	Trees like cladogram are said to be scaled
C.	The scaled trees have the advantage of showing both the evolutionary relationships and information about the relative divergence time of the branches
D.	In a cladogram, the external taxa line up neatly in a row or column
Answer» C. The scaled trees have the advantage of showing both the evolutionary relationships and information about the relative divergence time of the branches

Discussion

Explore topic-wise MCQs in Bioinformatics.

In Jukes–Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____

DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms.

Protein sequences can remain the same while the corresponding DNA sequences have more room for variation.

In many cases sequences are preferable to sequences because they are relatively conserved.

For studying the evolution of __ divergent groups of organisms, one may choose either nucleotide sequences, such as ribosomal RNA or protein sequences.

For unrooted trees, the number of unrooted tree topologies (NU) is ________

The number of rooted trees (NR) for n taxa is ______

Which of the following is an incorrect statement about Newick Format?

PROTEIN_SEQUENCES_CAN_REMAIN_THE_SAME_WHILE_THE_CORRESPONDING_DNA_SEQUENCES_HAVE_MORE_ROOM_FOR_VARIATION.?$

In Jukes‚Äö√Ñ√∂‚àö√ë‚àö¬®Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____$#

DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms.$

In many cases, sequences are preferable to sequences because they are relatively conserved?

For studying the evolution of __ divergent groups of organisms, one may choose either nucleotide sequences, such as ribosomal RNA or protein sequences?

Which of the following is incorrect statement about Molecular Markers?

It can be computationally very demanding to find a true phylogenetic tree when the number of sequences is large.

For unrooted trees, the number of unrooted tree topologies (NU) is ________

The number of rooted trees (NR) for n taxa is ______

Sometimes a tree-building method may result in several equally optimal trees. A consensus tree can be built by showing the commonly resolved bifurcating portions and collapsing the ones that disagree among the trees, which results in a polytomy.

Which of the following is incorrect statement about Newick Format?

Which of the following is incorrect statement?

Explore topic-wise MCQs in Bioinformatics.

In Jukes–Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____

DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms.

Protein sequences can remain the same while the corresponding DNA sequences have more room for variation.

In many cases ______ sequences are preferable to ______ sequences because they are relatively ____ conserved.

For studying the evolution of ________ divergent groups of organisms, one may choose either ______ nucleotide sequences, such as ribosomal RNA or protein sequences.

For unrooted trees, the number of unrooted tree topologies (NU) is ________

The number of rooted trees (NR) for n taxa is ______

Which of the following is an incorrect statement about Newick Format?

PROTEIN_SEQUENCES_CAN_REMAIN_THE_SAME_WHILE_THE_CORRESPONDING_DNA_SEQUENCES_HAVE_MORE_ROOM_FOR_VARIATION.?$

In Jukes‚Äö√Ñ√∂‚àö√ë‚àö¬®Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____$#

DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms.$

In many cases, ______ sequences are preferable to ______ sequences because they are relatively ____ conserved?

For studying the evolution of ________ divergent groups of organisms, one may choose either ______ nucleotide sequences, such as ribosomal RNA or protein sequences?

Which of the following is incorrect statement about Molecular Markers?

It can be computationally very demanding to find a true phylogenetic tree when the number of sequences is large.

For unrooted trees, the number of unrooted tree topologies (NU) is ________

The number of rooted trees (NR) for n taxa is ______

Sometimes a tree-building method may result in several equally optimal trees. A consensus tree can be built by showing the commonly resolved bifurcating portions and collapsing the ones that disagree among the trees, which results in a polytomy.

Which of the following is incorrect statement about Newick Format?

Which of the following is incorrect statement?

In many cases sequences are preferable to sequences because they are relatively conserved.

For studying the evolution of __ divergent groups of organisms, one may choose either nucleotide sequences, such as ribosomal RNA or protein sequences.

In many cases, sequences are preferable to sequences because they are relatively conserved?

For studying the evolution of __ divergent groups of organisms, one may choose either nucleotide sequences, such as ribosomal RNA or protein sequences?