Long Noncoding RNA: The Genome's Hidden Regulators
Long noncoding RNAs regulate gene activity without encoding proteins. Learn how lncRNAs work, their role in disease, and why the genome holds 36,000.
Biology and Life Sciences
57 glossary terms
Biology and life sciences cover everything from the molecular machinery inside a single cell to the evolutionary forces that shape whole ecosystems. The terms in this section span genetics, anatomy, microbiology, ecology, and the frontier where biology meets chemistry and computation. Some are classroom staples like the double helix or photosynthesis. Others capture ideas you may never have encountered, from horizontal gene transfer to zygotic gene activation. Together they form the vocabulary scientists use to describe how life works, how it began, and how it continues to surprise us.
Zygotic Gene Activation: How Embryos Start Reading Their Own DNA
Zygotic gene activation (ZGA) is the process by which a fertilized embryo begins transcribing its own DNA, ending its dependence on maternal RNA and proteins inherited from the egg.
Protein Folding Prediction: How AI Decoded Biology's 50-Year Puzzle
Protein folding prediction uses computational methods to determine the three-dimensional shape a protein adopts from its amino acid sequence, central to drug design and disease research.
Y-Chromosome DNA Analysis: Tracing Paternal Lineage Through Genetics
Y-chromosome DNA analysis examines markers on the Y chromosome to trace paternal lineage, assign haplogroups, and identify males in forensic casework.
Xylem Transport: How Water Climbs to the Canopy
Xylem transport moves water and minerals from roots to leaves through dead, hollow cells, driven by transpiration and the cohesion-tension mechanism.
Recombinant DNA Technology: How Gene Splicing Built Modern Biotech
Recombinant DNA technology joins DNA fragments from different organisms into a single molecule for copying and expression in a host cell.
Junk DNA: Why 98% of Your Genome Still Matters
Junk DNA refers to noncoding stretches of the genome once considered functionless. Many regulate gene activity, maintain chromosomes, and drive evolution.
Jurassic Period Biodiversity: How Extinction Built a New World
Jurassic period biodiversity is the variety of life that existed 201.3 to 145 million years ago, when dinosaurs dominated, the first birds appeared, and ecosystems rebuilt after mass extinction.
Krebs Cycle: The Metabolic Hub That Powers Every Cell
The Krebs cycle is a sequence of eight enzyme-driven reactions inside mitochondria that extracts energy from acetyl-CoA and channels it toward ATP production.
Vaccinia Virus: From Smallpox Vaccine to Cancer Therapy
Vaccinia virus is a large DNA virus in the Orthopoxvirus genus that served as the smallpox vaccine's active component and now works as a vector in cancer therapy and gene research.