Question 1

The dog Canis familiaris genome has recently been sequenced.About how many of the dog's genes are shared with humans?

Accepted Answer

The answer of The dog Canis familiaris genome has...

Question 2

One major difference between prokaryotic and eukaryotic genes is that eukaryotic genes can contain internal sequences,called_______ ,which get removed in the mature message.

Accepted Answer

Eukaryotic genes can contain internal sequences called introns, which do not code for proteins and are removed during RNA splicing to produce a mature mRNA transcript. Prokaryotes, on the other hand, do not have introns in their genes.

Question 3

With the rise of drug- resistant bacteria in hospitals there has been an effort to develop new antibiotics as well as novel methods to combat resistant infections.The sequencing of entire communities of organisms including environmental samples has led to the discovery of millions of uncharacterized bacteria that could provide new drugs.This sequencing method is called_______ .

Accepted Answer

Environmental genomics involves sequencing entire communities of organisms from environmental samples to discover new bacteria and potential drugs.

Question 4

Describe how comparative genomics is aiding in the discovery and treatment of human disease.

Accepted Answer

The answer of Describe how comparative genomics is aiding in...

Question 5

A common first separation technique in 2D gels is isoelectric focusing.What property is isoelectric focusing taking advantage of?

Accepted Answer

Isoelectric focusing separates proteins based on their isoelectric point (pI), the pH at which their net charge is zero. By subjecting proteins to a pH gradient created using ampholytes (molecules with both acidic and basic groups), proteins migrate until they reach their pI, where they become electrically neutral and stop migrating. This creates distinct bands of proteins along the pH gradient, allowing for separation and analysis. Therefore, the property that isoelectric focusing takes advantage of is the pH at which the overall charge is zero.

Question 6

The data from metagenomic experiments is commonly displayed in a Venn diagram where there is overlap between datasets that suggest correlation with disease states.If a patient exhibits genomic sequences from multiple overlapping regions of the diagram what happens to their predisposition to the disease?

Accepted Answer

If a patient exhibits genomic sequences from multiple overlapping regions of the Venn diagram, it suggests that they have a higher likelihood of being predisposed to the disease. Therefore, the predisposition to the disease goes up.

Question 7

Genomes from several primates have been sequenced and annotated.These primates range from chimpanzee to Rhesus monkey to Neanderthal and modern humans.What is the advantage of having so many primate sequences available to researchers?

Accepted Answer

Having multiple primate sequences allows researchers to compare genomes and determine evolutionary trends, such as how certain genes evolved or were lost over time. This knowledge can provide insights into the evolution of primates, including humans, and can help researchers understand the genetic basis for traits or diseases.

Question 8

Transcriptomics requires the isolation of RNA to generate sequence data.If a scientist wants to use next- generation sequencing to perform their experiment which of the following is necessary?

Accepted Answer

Reverse transcriptase is necessary to convert RNA into complementary DNA (cDNA) for sequencing. Protein quantification and the presence of euchromatin or heterochromatin are not directly relevant to transcriptomics or sequencing.

Question 9

The genome of the domesticated dog,Canis familiaris,was sequenced in 2005.Using the dog as a model system provides insight into which of the following human disease states?

Accepted Answer

The domesticated dog, Canis familiaris, shares many genetic similarities with humans, making it a valuable model for studying a wide range of human diseases. This includes aneuploidies (abnormal number of chromosomes), multifactorial diseases (diseases caused by multiple genes and environmental factors), and behavioral conditions such as obsessive-compulsive disorders. Dogs exhibit a variety of naturally occurring genetic disorders that are analogous to human conditions, making them an important model for genetic research.

Question 10

A microbiome is essential for human infant development.Where does an infant obtain the origins of its microbiome?

Accepted Answer

An infant obtains the origins of its microbiome from the mother during birth, specifically from contact with the mother's vaginal and fecal microbiota. The bacteria continue to be acquired from the mother through breastfeeding and skin-to-skin contact.

Question 11

DNA microarray analysis is excellent for _______.

Accepted Answer

DNA microarray analysis allows for the simultaneous analysis of all expressed genes in a sample. It does not provide information about unexpressed genes or allow for detailed analysis of a single gene's expression.

Question 12

Using RNA- seq generates data in situ.What does RNA- seq not provide data for?

Accepted Answer

RNA-seq provides data on the sequence of the RNA (A), the location of the transcript in the genome (B), and gene expression levels (D) by counting the number of reads that map to each gene. However, it does not directly measure the amount of protein produced by the RNA (C); this would require a different type of analysis, such as proteomics.

Question 13

Nutrigenomics is the study of_______ .

Accepted Answer

Nutrigenomics is the study of the relationship between diet and the genome, specifically how individual genetic variations affect a person's response to certain nutrients and how nutrients affect gene expression.

Question 14

Aligning genome sequences from different organisms to determine their evolutionary history is referred to as_______ .

Accepted Answer

Comparative genomics involves aligning genome sequences from different organisms to determine their evolutionary history, making it the best choice among the given options. Evogenomics refers to the study of the evolution of genomes within a species or population, while metagenomics involves the study of genetic material recovered directly from environmental samples. Stone-age genomics is a made-up term and is not a recognized field of study.

Question 15

A drawback to using microarrays is_______ .

Accepted Answer

The variability of researcher-made microarrays can lead to inconsistent results and decrease the overall reliability of the experiment.

Question 16

Proteomics is the "- omics" study of proteins,investigating the complete set of proteins in a cell.What does proteomics provide data on?

Accepted Answer

Proteomics provides data on posttranslational modifications to proteins, which are alterations that occur after the protein has been translated from its gene sequence. Proteomics does not provide data on the amount of protein in a cell, the gene sequence for the protein, or the similarity between genes coding for a protein.

Question 17

Transcriptomics is _______.

Accepted Answer

Transcriptomics is defined as the study of the transcriptome, which is the complete set of RNA transcripts that are produced by the genome under specific conditions. This involves the quantification of gene expression levels to understand how genes are being used and regulated in different cellular contexts. Therefore, option B is the best choice. Options A, C, and D are not accurate definitions of transcriptomics.

Question 18

Which of the following is a major contributor to variation in gene density in eukaryotes?

Accepted Answer

The answer of Which of the following is a major...

Question 19

The advent of genomic sequencing and annotations using bioinformatics has led to the realization that some of the long- held beliefs about prokaryotic genome structure were incorrect.Which of the following has not been refuted by modern bioinformatic discoveries?

Accepted Answer

Prokaryote genomes were traditionally thought to lack introns, but this has been challenged by discoveries of introns in some prokaryotes. However, the statement that prokaryote genomes do not contain introns has not been universally refuted by bioinformatics, as introns are still relatively rare in prokaryotes compared to eukaryotes. The other options (B, C, D) have been refuted or shown to be too simplistic by modern genomic studies. For example, some prokaryotes have been found to have linear chromosomes or multiple chromosomes, bacterial genome sizes can vary widely, and not all bacterial genomes are circular.

Question 20

Several years ago,scientists compared the genome of a wooly mammoth to that of an African elephant and found them to be 98.5% identical.This is an example of what type of "- omics"?

Accepted Answer

The answer of Several years ago,scientists compared the genome of...

Quiz 21: Genomic Analysis

The dog Canis familiaris genome has recently been sequenced.About how many of the dog's genes are shared with humans?