Mystery of meteors: Building blocks of life remain elusive

meteors space Earth Mass Effect

Three of the five nucleobases — molecular subcomponents of information-bearing nucleotides which make up our genetic code — likely came from space. But the origins of two key components of RNA and DNA remain a mystery, say two McMaster University astrobiologists.

In a paper just published in the journal Astrobiology, co-authors Ben K.D. Pearce and Ralph Pudritz report that they are able to account for the meteoritic origins of the genetic nucleobases adenine, guanine, and uracil. But after painstaking models to simulate the creation of the five nucleobase building blocks of RNA and DNA — the molecular data-storing templates for life as we know it — they remain puzzled over the origins of cytosine and thymine.

“Imagine an asteroid collision occurs, fragmenting the asteroid and sending fragments on trajectories that will intercept early Earth,” said Pearce. “These nucleobases would fall to the surface as meteorites, and thaw.”

If a meteorite fell into, say, a pond, he explains, the nucleobases could seep from the pores of the meteorite into the pond water, and possibly react with other chemicals to form nucleotides, and then RNA.

However, no nucleobases have yet been detected on the surfaces of ices in space, the authors note.

The GLP aggregated and excerpted this blog/article to reflect the diversity of news, opinion, and analysis. Read full, original post: Astrobiologists Still Puzzled Over Origins Of Our Genetic Code

Outbreak Daily Digest
Biotech Facts & Fallacies
Genetics Unzipped
Infographic: How dangerous COVID mutant strains develop

Infographic: How dangerous COVID mutant strains develop

Sometime in 2019, probably in China, SARS CoV-2 figured out a way to interact with a specific "spike" on the ...

Philip Njemanze: Leading African anti-GMO activist claims Gates Foundation destroying Nigeria

Nigerian anti-GMO activist, physician, and inventor pushes anti-gay and anti-GMO ...

Most Popular

News on human & agricultural genetics and biotechnology delivered to your inbox.
glp menu logo outlined

Newsletter Subscription

Optional. Mail on special occasions.
Send this to a friend