Download Four processes were needed for the spontaneous

Four processes were needed for the spontaneous origin of life on Earth.
#3 Origin of self-replicating molecules that made inheritance possible
Read “Hunting the Replicators, How Did Life Begin?” and write a 5 sentence summary here.
In living systems, information flows from _______  ________  _______________
What is RNA?

Ribonucleic acid is a___________________
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RNA is essential for _____________________________________

Like DNA, RNA is made up of a long chain of _________________
Each consists of a _______, a __________________ and a ____________
How is RNA different than DNA?
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RNA contains the sugar __________, while DNA contains the
REVIEW: draw ribose
slightly different sugar _____________

RNA has the base ____________ while DNA contains
___________________
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Unlike DNA, most RNA molecules are
________________________ and can adopt very complex _______________________________
Remember, in living systems, information flows from _______  ________  _______________
This sequence probably developed in stages.
RNA FIRST HYPOTHESIS
1. The first _______________________ and enzymes were RNA molecules
2. Why RNA? RNA can act as a catalyst to:
a. Bind ____________________ together to form _______________
b. ______________________ itself to create more RNA
3. __________ can be transcribed to __________ (using reverse transcriptase); this could have given rise to the
first DNA
4. DNA is more stable than RNA and eventually took over carrying the genetic information
Arguments for the RNA First hypothesis
•
In Miller’s experiments, ___________ was created and _________________ was harder to produce.
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______ has a simpler structure then ________.
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RNA exists in _______________ (and no DNA)
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It has been proved experimentally that RNA has _____________________
•
The DNA-protein system cannot work without ____________.