EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA produced by reverse transcriptase from abiotically produced RNA.
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DNA molecules whose information was transcribed to RNA and later translated in polypeptides.
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auto-catalytic RNA molecules.
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oligopeptides located within protobionts.
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Detailed explanation-1: -DNA and RNA, the two major modern forms of genetic code underpinning all of earthly biology, could have coexisted in strict pairings on our planet before life arose here, scientists in England, Scotland and Poland say.
Detailed explanation-2: -The “genes-first” hypothesis Many scientists who subscribe to this hypothesis think that RNA, not DNA, was likely the first genetic material. This is known as the RNA world hypothesis. Scientists favor RNA over DNA as the first genetic molecule for several reasons.
Detailed explanation-3: -Evidence that RNA arose before DNA in evolution can be found in the chemical differences between them.
Detailed explanation-4: -One theory is that RNA, a close relative of DNA, was the first genetic molecule to arise around 4 billion years ago, but in a primitive form that later evolved into the RNA and DNA molecules that we have in life today.