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Splicing is a process where premRNA is transformed into mRNA. It involves the removal of Introns ( gene sequences which do not code for proteins ) and the attachment of exons (sequences which code for protei...

Osmosis is the diffusion of water from a dilute solution to a concentrated solution across a partially permeable membrane. Terms: Diffusion (the net movement of particles from a high to a low concentration.)...

Prokaryotes do not have a membrane bound nucleus, eukaryotes do. Prokaryotes have plasmids. Prokaryotes have smalled ribosomes than eukaryotes. Eukaryotes have more organelles than prokaryotes. I.e. eukaryot...

The liver is supplied by the hepatic artery bringing oxygenated blood to it. The liver is also supplied by the hepatic portal vein. This brings the absorbed nutrients from the small and large intestine to th...

A zymogen is the inactive form of an enzyme. For instance the enzyme pepsinogen is produced by chief cells in the gastric pits. Pepsinogen is a zymogen. Hydrochloric acid produced by the parietal cells of th...