Welcome to Science Reader!
Welcome to Science Reader!
molecular biology
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.
Yeast Artificial Chromosomes: How YACs Mapped the Human Genome
A yeast artificial chromosome (YAC) is a laboratory-built DNA molecule that replicates in yeast and carries foreign DNA fragments up to one million...
Lamarckian Evolution: The Theory That Refuses to Die
Lamarckian evolution proposes that organisms pass traits acquired during their lifetimes to offspring. Epigenetic research has revived aspects of the idea.
Mitochondrial Eve: The Maternal Ancestor of All Living Humans
Mitochondrial Eve is the most recent woman from whom all living humans inherited their mitochondrial DNA through an unbroken maternal line, a statistical...
Zymogen Activation: How Inactive Enzymes Power Digestion
Zymogen activation is the conversion of an inactive enzyme precursor into its active form through proteolytic cleavage, ensuring digestive enzymes activate only at...
Retrovirus Replication Cycle: How RNA Viruses Hijack Cells
The retrovirus replication cycle converts viral RNA to DNA and integrates it into a host cell's genome to produce new virus particles.
Somatic Cell Nuclear Transfer: Cloning Technique Explained
Somatic cell nuclear transfer creates an embryo by moving a body cell's nucleus into an egg cell stripped of its own DNA, enabling...
Isomerism: Why Mirror-Image Molecules Matter
Isomerism describes compounds that share a molecular formula but differ in structure or spatial arrangement, producing distinct chemical and biological properties.
Gel Electrophoresis: How Scientists Sort Molecules by Size
Gel electrophoresis separates DNA, RNA, and proteins by pulling them through a porous gel with an electric field, sorting molecules by size.
Extremophile: Life That Thrives in Earth's Harshest Environments
An extremophile is an organism that thrives in conditions lethal to most life, including extreme heat, acidity, salinity, and pressure.
