Question 1

Which of the following best describes the primary purpose of bioinformatics in genomics?

Accepted Answer

To organize, share, and analyze data related to gene structure, sequence, and protein function using mathematical software applications

Question 2

In whole-genome shotgun sequencing, what is the correct order of steps?

Accepted Answer

Shearing or digestion, sequencing, alignment, contig overlap, gene identification by bioinformatics

Question 3

A BLAST search returns an identity value of 93% between a rat contig and a mouse gene. What does this indicate?

Accepted Answer

The rat contig likely contains a gene with a similar function to the mouse gene

Question 4

Which hallmark feature is used to identify a protein-coding gene during genome annotation?

Accepted Answer

Distinguishing between exons and introns, and identifying regulatory sequences such as promoters and enhancers

Question 5

What is an open reading frame (ORF) and how is it typically identified?

Accepted Answer

A sequence of nucleotides that begins with ATG and ends with TAA, TAG, or TGA, corresponding to stop codons $$UAA$$, $$UAG$$, $$UGA$$

Question 6

Which statement about the human genome is correct?

Accepted Answer

Protein-coding sequences make up less than 2% of the genome

Question 7

Alternative splicing allows human cells to:

Accepted Answer

Produce multiple proteins from a single gene, increasing proteome diversity

Question 8

Which of the following is a real-world application of bioinformatics?

Accepted Answer

Predicting amino acid sequences from DNA

Question 9

A researcher uses BLAST to compare a newly sequenced gene to a database. The gene shows high similarity to a known gene in another species. What is the most likely conclusion?

Accepted Answer

The gene is homologous and likely has a similar function

Question 10

Which of the following best describes the function of GenBank?

Accepted Answer

A publicly available database of DNA sequences maintained by NCBI

Question 11

Which omics discipline focuses on the identification, characterization, and quantitative analysis of all proteins encoded by the genome?

Accepted Answer

Proteomics

Question 12

In two-dimensional gel electrophoresis (2DGE), proteins are separated based on which two properties?

Accepted Answer

Charge and molecular mass

Question 13

Mass spectrometry in proteomics is used to:

Accepted Answer

Analyze ionized samples in gaseous form and measure mass-to-charge ($$m/z) $$ratio of different ions

Question 14

Which of the following statements about the Neanderthal genome is correct?

Accepted Answer

Neanderthal genome is 99% identical to humans, and non-African humans contain 1–4% Neanderthal sequences

Question 15

Metagenomics allows scientists to:

Accepted Answer

Sequence genomes from communities of microbes in environmental samples without culturing them

Question 16

Which of the following is a limitation of whole-exome sequencing (WES)?

Accepted Answer

It fails to identify gene regulatory regions that influence gene expression

Question 17

A Venn diagram of gut microbial genes from patients with liver cirrhosis, Type 2 diabetes, and irritable bowel syndrome shows 403 shared genes. What does this suggest?

Accepted Answer

These 403 genes are common microbial markers for all three diseases

Question 18

Which statement about the distribution of genes on human chromosomes is correct?

Accepted Answer

Gene-rich clusters are separated by gene-poor deserts, which account for 20% of the genome

Question 19

Which of the following best describes the function of the ENCODE project?

Accepted Answer

To identify and analyze functional elements of the genome, such as transcription start sites, promoters, and enhancers

Question 20

Which of the following is a real-world application of nutrigenomics?

Accepted Answer

Providing customized nutritional reports based on genes associated with medical conditions

Genomics, Bioinformatics, and Proteomics: An Overview

Guida di studio - Domande di pratica

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