Questions and answers for exam Preparation

MCQs

Total Questions : 165 | Page 14 of 17 pages

Question 131. Comparative genomics includes a comparison of gene number, gene content, and gene location in both prokaryotic and eukaryotic groups of organisms.

True
False
May be True or False
Can't say

Discuss Question

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

Question 132. Which of the given statements is incorrect?

The processes of domain assortment and gene duplication produce families of proteins in organisms
Following speciation, a newly derived genome will inherit the families of ancestor organisms, but will also develop new ones to meet evolutionary challenges
Comparison of each of the proteins encoded by an organism with every protein, an all-against-all comparison, reveals which protein families have been amplified and what rearrangements have occurred as steps in the evolutionary process
When two or more proteins in the proteome share a high degree of similarity they are least likely to be paralogs

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Answer: Option D. -> When two or more proteins in the proteome share a high degree of similarity they are least likely to be paralogs
Answer: (d).When two or more proteins in the proteome share a high degree of similarity they are least likely to be paralogs

Question 133. Which of the given statements is incorrect?

Two tandem copies of a gene are produced while Proteins with new functions are produced
Proteins with new functions are produced by a gene duplication event
Assortment and reassortment of protein domains takes place in individual genomes
In no case the two duplicated genes both undergo change

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Answer: Option D. -> In no case the two duplicated genes both undergo change
Answer: (d).In no case the two duplicated genes both undergo change

Question 134. Which of the given statements is incorrect?

Proteins may be clustered into families on the basis of either sequence or structural similarity
Proteins often comprise separate domains
The number of protein sequences that are available is insufficient to determine that domain shuffling occurs in evolution
Proteins are modular

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Answer: Option C. -> The number of protein sequences that are available is insufficient to determine that domain shuffling occurs in evolution
Answer: (c).The number of protein sequences that are available is insufficient to determine that domain shuffling occurs in evolution

Question 135. Which of the following information Sequence comparisons do not provide?

Gene relationships
Function history
Evolutionary history
Gene locations

Discuss Question

Answer: Option D. -> Gene locations
Answer: (d).Gene locations

Question 136. Which of the given statements is incorrect about Family and Domain Analysis?

Gene identification of predicted proteins in the genome is designed to discover the metabolic features of an organism
In a particular organism or group of organisms, one particular domain can be expanded to perform a particular function
Comparison of the domain content of an entire proteome with that of another proteome cannot help in revealing the biological roles of diverse domains in different organisms
Different proteins are mosaics of domains that occur in different combinations in a given protein

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Answer: Option B. -> In a particular organism or group of organisms, one particular domain can be expanded to perform a particular function
Answer: (b).In a particular organism or group of organisms, one particular domain can be expanded to perform a particular function

Question 137. Which of the given statements is incorrect about Horizontal Gene Transfer?

It is a significant source of genome variation in bacteria, allowing them to exploit new environments
Such transfer is rendered possible by a variety of natural mechanisms in bacteria for transferring DNA from one species to another
Detection of HT is made possible by the fact that each genome of each bacterial species has a unique base composition
The time of transfer of DNA cannot be estimated by the composition of the HT DNA

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Answer: Option D. -> The time of transfer of DNA cannot be estimated by the composition of the HT DNA
Answer: (d).The time of transfer of DNA cannot be estimated by the composition of the HT DNA

Question 138. Which of the given statements is incorrect about Ancient Conserved Regions?

The method involves database similarity searches of the SwissProt database with human, worm, yeast, or E. coli genes and identification of matches with sequences from a different phylum than the query sequence
An analysis of ACRs that predate the radiation of the major animal phyla some 580–540 million years ago suggested that 50–60% of coding sequences are ACRs
These ACRs may represent proteins present at the time of the prokaryotic–eukaryotic divergence
Phylogenetically diverse groups of organisms have been analyzed for the presence of conserved proteins and protein domains that have been conserved over long periods of evolutionary time, called ancient conserved regions or ACRs

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Answer: Option B. -> An analysis of ACRs that predate the radiation of the major animal phyla some 580–540 million years ago suggested that 50–60% of coding sequences are ACRs
Answer: (b).An analysis of ACRs that predate the radiation of the major animal phyla some 580–540 million years ago suggested that 50–60% of coding sequences are ACRs

Question 139. Annotation is based on finding significant alignment to sequences of known function in database similarity searches.

True
False
May be True or False
Can't say

Discuss Question

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

Question 140. Which of the given statements is incorrect about Horizontal Gene Transfer?

The genomes of most organisms are derived by vertical transmission, the inheritance of chromosomes from parents to offspring from one generation to the next
It is the acquisition of genetic material from a different organism
The transferred material becomes a temporary addition to the recipient genome
An extreme example is the proposed endosymbiont origin of mitochondria in eukaryotic cells and chloroplasts in plants

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Answer: Option C. -> The transferred material becomes a temporary addition to the recipient genome
Answer: (c).The transferred material becomes a temporary addition to the recipient genome