Question 1
The density of the network given below is
0.7
0.28
1.4
1.2

The IIT Madras BS Big Data and Biological Networks (Big Data and Biological Networks) Quiz 1 paper sat on 25 Feb 2024, in the January 2024 term: 29 questions for 50 marks in 120 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.
The density of the network given below is
0.7
0.28
1.4
1.2
Correct answer
0.7
Consider a bipartite graph with two node sets, A and B. Set A contains 5 nodes, and Set B con-tains 7 nodes. If the graph has a total of 23 edges, the average degree of the bipartite graph is
2.7
1.91
3.83
3.2
Correct answer
3.83
Using the following code to answer the question below
What output will be printed by the code?
[0, 1, 1, 1, 0, 0]
[0, 1, 0, 0, 1, 0]
[2, 3, 4]
[1,2, 3, 4]
Correct answer
[2, 3, 4]
Which of the following is a characteristic property of Erdös –Rényi random networks?
Scale-free degree distribution.
Small-world phenomenon.
Uniform probability of edges between nodes.
Hierarchical modular structure.
Correct answer
Uniform probability of edges between nodes.
Match the following omics approaches and the techniques used to study them
i-c, ii-c, iii-d iv-a
i-b, ii-c, iii-a, iv-a
i-c, ii-d, iii-a, iv-b
i-b, ii-c, iii-d iv-a
Correct answer
i-b, ii-c, iii-a, iv-a
Assertion: RNA polymerase II is responsible for transcribing protein-coding genes in eukaryotic cells.
Reason: RNA polymerase II recognizes and binds to the promoter regions of protein-coding genes, initiating the transcription process.
Both the assertion and reason are correct, and the reason is a correct explanation of the assertion.
Both the assertion and reason are correct, but the reason is not a correct explanation of the assertion.
The assertion is correct, but the reason is incorrect.
The assertion is incorrect, but the reason is correct.
Correct answer
Both the assertion and reason are correct, and the reason is a correct explanation of the assertion.
Assertion: The binding of RNA polymerase to the promoter region is a crucial step in transcription. Reason: The promoter region consists of sequences that is recognised by the RNA polymerase.
Both the assertion and reason are correct, and the reason is a correct explanation of the assertion.
Both the assertion and reason are correct, but the reason is not a correct explanation of the assertion.
The assertion is correct, but the reason is incorrect.
The assertion is incorrect, but the reason is correct.
Correct answer
Both the assertion and reason are correct, but the reason is not a correct explanation of the assertion.
Match the GWAS term with its description.
| Column A | Column B | ||
|---|---|---|---|
| A | SNP | 1 | Visualization of genomic regions associated with traits or diseases |
| B | P-value | 2 | A statistical measure indicating the strength of association between a genetic variant and a trait. |
| C | Manhattan plot | 3 | Patterns of non-random association of alleles at different loci. |
| D | Linkage disequilibrium | 4 | Common type of genetic variation analysed in GWAS |
A - 2, B - 1, C - 4, D - 3
A - 4, B - 3, C - 1, D - 2
A - 4, B - 2, C - 1, D - 3
A - 3, B - 2, C - 4, D - 1
Correct answer
A - 4, B - 2, C - 1, D - 3
Choose the bipartite graphs from the options representing various graphs, shown below:
Correct answers
In the graph shown below:
Only the red node has high betweenness
The blue node and the red node have high betweenness
The blue node has high betweenness and high degree
The red node has a high degree
Correct answers
The blue node and the red node have high betweenness
The blue node has high betweenness and high degree
Choose the TRUE statement
A smaller characteristic path length indicates a network is tightly connected.
In an Erdös–Rényi G(n ,p) network, there are hub nodes to which new nodes connect with higher probability, as the network grows.
The degree distribution of Erdös–Rényi G(n ,p) network follows the Poisson distribution, for large n
In a hypergraph, every hyper-edge is a subset of V × V where V is the set of all vertices in the graph.
Correct answers
A smaller characteristic path length indicates a network is tightly connected.
The degree distribution of Erdös–Rényi G(n ,p) network follows the Poisson distribution, for large n
What happens to the connectivity of Erdös–Rényi G(n ,p) random networks as the probability increases?
The network becomes more disconnected.
The network transitions to a fully connected graph.
The average degree of the network increases.
The diameter of the network increases.
Correct answers
The network transitions to a fully connected graph.
The average degree of the network increases.
Use the attached graph to answer the given subquestions:
The diameter of the given network is ____
Correct answer: 4
Use the attached graph to answer the given subquestions:
The clustering coefficient of node 5 is ________
NOTE: Enter your answer in one decimal place.
Correct answer: 0.1
Use the attached graph to answer the given subquestions:
The given graph is
Labelled, undirected, unweighted
Bipartite, labelled, undirected, unweighted
Complete, labelled, unweighted
Unlabelled, weighted, undirected
Correct answer
Labelled, undirected, unweighted
What is the role of topoisomerase in DNA replication
Synthesis of a new DNA strand from 5’->3’ using the parental strand as a template.
Relieving of DNA supercoiling by formed dues to unwinding of the two strands.
Prevents annealing of the parental strands.
None of these.
Correct answer
Relieving of DNA supercoiling by formed dues to unwinding of the two strands.
GWAS is used for
A. It aims to find a relation between genotype and phenotype by studying the gene products affecting the phenotype.
B. Identifying the association between genotype and phenotype by comparing statistically significant genetic variants of individuals in a population.
Only A
Only B
Both A and B
None of these.
Correct answer
Only B
What is the primary focus of transcriptomics?
Study of protein structures.
Examination of DNA sequences.
Analysis of gene expression at the RNA level.
Investigation of cell morphology.
Correct answer
Analysis of gene expression at the RNA level.
What is the primary advantage of Next-Generation Sequencing (NGS) over traditional Sanger sequencing?
Longer read lengths.
Higher accuracy.
Higher throughput.
Lower cost per base.
Correct answer
Higher throughput.
Which of the following represents the start codon in mRNA that initiates translation?
AUG
UGA
UAA
CCC
Correct answer
AUG
Which of the following is/are correct regarding DNA replication
DNA Replication occurs from 5’-> 3’ end.
The leading strand is synthesised in a continuous manner.
DNA polymerase cannot initiate DNA replication.
The lagging strand is synthesised in a continuous manner.
Correct answers
DNA Replication occurs from 5’-> 3’ end.
The leading strand is synthesised in a continuous manner.
DNA polymerase cannot initiate DNA replication.
Which of the following is/are true regarding RNA
RNA has Uracil instead of Thymine
RNA has a deoxyribose sugar backbone.
tRNA is translated to protein
RNA is more stable than DNA
Correct answer
RNA has Uracil instead of Thymine
Select the correct statements about stop codons.
Stop codons signal the beginning of translation.
There are three different stop codons in the standard genetic code.
Stop codons do not specify any amino acid.
Mutations converting a stop codon into a start codon can result in normal protein synthesis.
Correct answers
There are three different stop codons in the standard genetic code.
Stop codons do not specify any amino acid.
Mutations converting a stop codon into a start codon can result in normal protein synthesis.
Application of genomics include
Studying evolutionary patterns across different strains and species.
Identifying the gene expression patterns in cells.
Studying post translational modifications.
Identify genetic associations to phenotypic traits.
Correct answers
Studying evolutionary patterns across different strains and species.
Identify genetic associations to phenotypic traits.
Which of the following statements accurately describe the goals of the 1000 Genomes Project?
To study the gene expression patterns amongst different individuals
To catalogue the genetic variations in human populations from different ethnic groups.
To identify common and rare variants that affect various phenotypes in human genome.
To provide a comprehensive resource for understanding human genetic diversity
Correct answers
To catalogue the genetic variations in human populations from different ethnic groups.
To identify common and rare variants that affect various phenotypes in human genome.
To provide a comprehensive resource for understanding human genetic diversity
Read the sequence of the sample obtained from sangers sequencing from 5’-> 3’ based on the gel picture given below.
Correct answer: GTACCCGAAATCAGGA
Answer the given subquestions from the plot.
What is the name of the plot?
Correct answer: Manhattan plot
Answer the given subquestions from the plot.
Identify the causal SNPs from the plot. (Separate each answer with a space or a comma)
Correct answer: A B C D E or A,B,C,D,E or A, B, C, D, E
Answer the given subquestions from the plot.
Identify the SNP with the highest statistical significance.
Correct answer: A