QUIZAlcohol Metabolism Explorer
How quickly a person breaks down alcohol depends on two enzymes, ADH1B and ALDH2, and on the DNA that…
Topic
Gene Expression
Gene expression follows the path from DNA sequence to functional protein, including replication, transcription, translation, and the regulation that switches genes on and off. Molecular tools such as PCR and gel electrophoresis show how these processes are studied in practice.
12 interactives
QUIZ
QUIZCell Differentiation Simulator
Every cell in a body carries the same DNA, yet a nerve cell and a muscle cell are nothing alike, because…
SIMDNA Replication Simulator
Before a cell divides it must copy its entire genome, and a team of enzymes does the work: unwinding the…
LABEnvironmental Effects on Phenotype Lab
A genotype does not fix a phenotype on its own. Identical genes can produce very different traits…
SIMEpic genetics Simulator
Every cell in an organism carries the same DNA, yet cells behave differently because they express…
GAMEGTS (Gram Theft Strepto)
A bacterium in the body faces a constant problem: find nutrients, avoid immune cells hunting it down,…
SIMNucleic Acid Builder
DNA and RNA are built from nucleotides, each made of a phosphate group, a five carbon sugar and a…
QUIZOperail: Gene Regulation Simulation
Bacteria do not transcribe every gene all the time; they switch genes on and off as conditions change.…
SIMVariant Ventures
Viruses copy their genetic material imperfectly, so each round of replication can throw up variants with…
LABVirtual Gel Electrophoresis
Gel electrophoresis separates DNA fragments and proteins by pulling them through a gel with an electric…
LABVirtual PCR
PCR copies a chosen stretch of DNA millions of times, which is how a lab gets enough material to test…
LABVirtual Restriction Digest
Restriction enzymes cut DNA wherever a specific short sequence appears, which lets biologists break a…