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EvC Forum ⇒ Science Forums ⇒ Origin of Life ⇒

Could RNA start life?

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Topic: Could RNA start life?

Genomicus

Member (Idle past 1960 days)

Posts: 852

Joined: 02-15-2012

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Message 20 of 105 (682754)
12-05-2012 10:08 AM

Reply to: Message 19 by Dr Jack
12-05-2012 6:59 AM

Re: Life is chemicals, not purposes

There are no known occurrences of DNA acting enzymatically...

One of the cool things about biology is that it's unpredictable. Deoxyribozymes have, in fact, been discovered. See, e.g., "In vitro selection, characterization, and application of deoxyribozymes that cleave RNA."

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	Message 19 by Dr Jack, posted 12-05-2012 6:59 AM		Dr Jack has replied

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	Message 23 by Dr Jack, posted 12-05-2012 2:45 PM	Genomicus has replied

Genomicus

Member (Idle past 1960 days)

Posts: 852

Joined: 02-15-2012

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Message 24 of 105 (682920)
12-05-2012 10:42 PM

Reply to: Message 23 by Dr Jack
12-05-2012 2:45 PM

Re: Life is chemicals, not purposes

Excellent! Thank you, Genomicus...

You're welcome

You are indeed correct in pointing out that there are no known naturally occurring DNA enzymes. Although I do not find the RNA world scenario very compelling, I wonder if there is any literature on the possibility of DNA enzymes playing a role in the RNA world hypothesis.

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	Message 23 by Dr Jack, posted 12-05-2012 2:45 PM		Dr Jack has not replied

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