Whole-genome methods examine many genes, RNA molecules, or proteins at once, giving researchers a broad view of how organisms function and respond to conditions. This lesson introduces genomics, transcriptomics, proteomics, and related fields, as well as how these approaches support research and diagnosis.
Genomics is the study and comparison of entire genomes, including an organism’s complete set of genes and their nucleotide sequences and organization. Comparing microbial genomes can help identify targets for new antibiotics, diagnostic tools, vaccines, treatments, and environmental cleanup methods.
All flashcards
What is genomics?
The study and comparison of entire genomes, including the complete set of genes and their nucleotide sequence and organization.
How do transcriptomics and proteomics differ?
Transcriptomics studies the complete collection of cellular mRNA molecules, while proteomics studies the complete complement of proteins.
What are metagenomics and metatranscriptomics?
Metagenomics studies genetic material from multiple species in a community; metatranscriptomics studies gene expression across that community.
What is a disease biomarker?
A measurable molecule whose presence or expression is affected by a disease process and can help researchers detect or characterize disease.
What is the difference between reverse genetics and classic phenotype-first analysis?
Reverse genetics begins with a known DNA sequence and investigates its resulting phenotype. Phenotype-first analysis begins with an observed trait and seeks the responsible gene or genes.
Quiz questions
What does genomics study?Answer: The complete set of genes in an organism, including their sequences and organization.
What is the main subject of transcriptomics?Answer: The complete collection of mRNA molecules produced by cells.
A researcher wants to study gene expression across a community containing uncultured microbes. Which approach is most appropriate?Answer: Metatranscriptomics
How may pharmacogenomics help guide treatment?Answer: By using genomic information to help predict which drugs may be effective and safe for an individual.
A known gene is altered and researchers observe the resulting trait. Which strategy does this illustrate?Answer: Reverse genetics
Based on Microbiology by Nina Parker, Mark Schneegurt, Anh-Hue Thi Tu, Philip Lister, Brian M. Forster (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.