"Scientists have confirmed for the first time that an important component of early genetic material which has been found in meteorite fragments is extraterrestrial in origin, in a paper published on 15 June 2008...The materials they have found include the molecules uracil and xanthine, which are precursors to the molecules that make up DNA and RNA, and are known as nucleobases."

http://www.eurekalert.org/pub_releases/2008-06/icl-sct061308.php

Uracil has the ability to absorb light. Is it possible that it could have been an energy source for the first self-replicating molecular structures?

"Time is what prevents everything from happening at once" - John Wheeler