Protobiont

Jump to: navigation, search

Protobionts are organisms that are controversially considered to have possibly been the precursors to prokaryotic cells.

A protobiont is an aggregate of abiotically produced organic molecules surrounded by a membrane or a membrane-like structure. It has been proven that protobionts could have spontaneously formed early in the earth's development, according to the laws of physics and chemistry. Protobionts exhibit some of the properties associated with life, including simple reproduction and metabolism, as well as the maintenance of an internal chemical environment different from that of their surroundings. It has been suggested that they are a key step in the origin of life on earth. Experiments by Sidney W. Fox and Aleksandr Oparin have demonstrated that they may be formed spontaneously, in conditions much like what the early Earth is thought to have been like. These experiments formed liposomes and microspheres, which have membrane structure similar to the phospholipid bilayer found in cells.

See also

External links

ca:Protobiont

de:Protobiont


Navigation WikiDoc | WikiPatient | Up To Date Pages | Recently Edited Pages | Recently Added Pictures

Table of Contents In Alphabetical Order | By Individual Diseases | Signs and Symptoms | Physical Examination | Lab Tests | Drugs

Editor Tools Become an Editor | Editors Help Menu | Create a Page | Edit a Page | Upload a Picture or File | Printable version | Permanent link | Maintain Pages | What Pages Link Here
There is no pharmaceutical or device industry support for this site and we need your viewer supported Donations | Editorial Board | Governance | Licensing | Disclaimers | Avoid Plagiarism | Policies
Linked-in.jpg