Featured Research

from universities, journals, and other organizations

New Insights Into The Origin Of Life On Earth

Date:
December 12, 2006
Source:
American Chemical Society
Summary:
In an advance toward understanding the origin of life on Earth, scientists have shown that parts of the Krebs cycle can run in reverse, producing biomolecules that could jump-start life with only sunlight and a mineral present in the primordial oceans.

In an advance toward understanding the origin of life on Earth, scientists have shown that parts of the Krebs cycle can run in reverse, producing biomolecules that could jump-start life with only sunlight and a mineral present in the primordial oceans.

Related Articles


The Krebs cycle is a series of chemical reactions of central importance in cells -- part of a metabolic pathway that changes carbohydrates, fats and proteins into carbon dioxide and water to generate energy.

Scot T. Martin and Xiang V. Zhang explain that a reverse version of the cycle, which makes enzymes and other biomolecules from carbon dioxide, has been getting attention from scientists studying the origin of life. If the reverse cycle worked on a lifeless Earth, it could have produced the fundamental biochemicals needed for the development of more-advanced biological systems like RNA that could reproduce themselves.

In a report scheduled for the Dec. 13 issue of the weekly Journal of the American Chemical Society, Martin and Zhang demonstrate that three of the five chemical reactions in the reverse Krebs cycle worked and produced biomolecules on the surface of a mineral believed to have been present in the waters of the early Earth. The mineral -- sphalerite -- acted as a photocatalyst that worked with sunlight to foster the chemical reactions.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Cite This Page:

American Chemical Society. "New Insights Into The Origin Of Life On Earth." ScienceDaily. ScienceDaily, 12 December 2006. <www.sciencedaily.com/releases/2006/12/061211115422.htm>.
American Chemical Society. (2006, December 12). New Insights Into The Origin Of Life On Earth. ScienceDaily. Retrieved March 3, 2015 from www.sciencedaily.com/releases/2006/12/061211115422.htm
American Chemical Society. "New Insights Into The Origin Of Life On Earth." ScienceDaily. www.sciencedaily.com/releases/2006/12/061211115422.htm (accessed March 3, 2015).

Share This


More From ScienceDaily



More Fossils & Ruins News

Tuesday, March 3, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Who Was The Wealthy Woman Buried Near King Richard III?

Who Was The Wealthy Woman Buried Near King Richard III?

Newsy (Mar. 3, 2015) A woman thought to have been an important person in Grey Friars monastery was found in a coffin near King Richard III. Her identity is unknown. Video provided by Newsy
Powered by NewsLook.com
Gerbils, Not Rats, Might Be To Blame For The Black Death

Gerbils, Not Rats, Might Be To Blame For The Black Death

Newsy (Feb. 24, 2015) The "black death" that killed tens of millions of people has been blamed on rats for years, but now researchers say they may have gotten a bad rap. Video provided by Newsy
Powered by NewsLook.com
Timbuktu Manuscripts Face an Uncertain Future

Timbuktu Manuscripts Face an Uncertain Future

AFP (Feb. 23, 2015) Two years ago a large number of manuscripts were taken from Timbuktu for safe keeping. Now the question is whether to return them. Duration: 02:50 Video provided by AFP
Powered by NewsLook.com
How Did A Mummy End Up In A 1,000-Year-Old Buddha Statue?

How Did A Mummy End Up In A 1,000-Year-Old Buddha Statue?

Newsy (Feb. 23, 2015) A CT scan has revealed a mummified Chinese monk inside a Buddha statue. The remains date back about 1,000 years. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins