Question 1

Which of the following best describes the main goal of the Human Genome Project?

Accepted Answer

To sequence the entire human genome, which consists of approximately 3 billion base pairs.

Question 2

What is the primary advantage of the whole-genome shotgun approach developed by J. Craig Venter and colleagues?

Accepted Answer

It allows for the rapid sequencing of random DNA fragments, which are then assembled using computer software.

Question 3

Which of the following is NOT a reason why genome sequencing is important in medicine?

Accepted Answer

To predict the exact lifespan of an individual.

Question 4

Which of the following statements about genome size and gene number is correct?

Accepted Answer

There is no systematic relationship between genome size and phenotype within each domain.

Question 5

What is the main function of bioinformatics in genomics?

Accepted Answer

To apply computational methods to the storage and analysis of biological data.

Question 6

Which of the following best explains why humans can produce more than one polypeptide per gene?

Accepted Answer

Alternative splicing of RNA transcripts allows for multiple polypeptides from a single gene.

Question 7

A researcher is comparing the genomes of two species. Which of the following would provide the best evidence for evolutionary relatedness?

Accepted Answer

Homology in DNA or protein sequences.

Question 8

Which of the following is a direct application of metagenomics?

Accepted Answer

Sequencing DNA from a group of species in an environmental sample to study complex communities.

Question 9

Which resource is a major public database for storing DNA sequences and is maintained by the National Center for Biotechnology Information (NCBI)?

Accepted Answer

GenBank

Question 10

Which of the following best describes the field of proteomics?

Accepted Answer

The systematic study of the full protein sets (proteomes) encoded by genomes.

Question 11

A scientist is using a systems biology approach to study cancer. Which of the following best describes this approach?

Accepted Answer

Modeling the dynamic behavior of whole biological systems based on the study of interactions among the system’s parts.

Question 12

Which of the following statements about gene density in humans is correct?

Accepted Answer

Humans have the lowest gene density among mammals, with much noncoding DNA between genes.

Question 13

Which of the following best explains the dramatic decrease in the cost of genome sequencing over the past two decades?

Accepted Answer

Advances in sequencing technologies, such as sequencing by synthesis, have increased speed and reduced costs.

Question 14

Which of the following is a key feature of the ENCODE project?

Accepted Answer

It identifies protein-coding genes, noncoding RNA genes, and regulatory sequences in the human genome.

Question 15

Which of the following is a plausible reason why the number of genes is not always correlated with genome size?

Accepted Answer

Large genomes may contain a significant amount of noncoding DNA.

Question 16

A patient’s genome is sequenced to determine their risk for a specific disease. Which concept does this application best illustrate?

Accepted Answer

Personalized medicine

Question 17

Which of the following best describes the process of sequencing a genome using the shotgun approach?

Accepted Answer

DNA is cut into overlapping fragments, sequenced, and assembled using computer software.

Question 18

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

Accepted Answer

Studying the microbial diversity in the human gut by sequencing all DNA present in a stool sample.

Question 19

Which of the following best explains why alternative splicing increases protein diversity in eukaryotes?

Accepted Answer

It allows a single gene to produce multiple mRNA transcripts, leading to different polypeptides.

Question 20

Which of the following is a key insight gained from comparing genome sequences of different species?

Accepted Answer

It provides clues to evolutionary relationships and developmental processes.

CH: 18.1 Genomes and Their Evolution: Sequencing, Bioinformatics, and Comparative Genomics

Study Guide - Practice Questions