Origins Of Life Flashcards
How did the planet originate?
Big Bang
- creation of universe
4.6 bil. Years ago—–> planet formation
In the 1500s what was believed in regards to the origins of life?
Spontaneous generation
What is our current understanding of the origins of life?
Biogenesis
What does biogenesis say?
life comes from life ( reproduction)
Where did the first organism come from?
Nonliving chemicals
What is abiogenesis?
States that first life comes from nonlife
What does the RNA first hypothesis state?
The first macromolecule was RNA
What is the process for the RNA first hypothesis?
1) Building blocks in H2O
2) Polymerization
3) Catalytic chains
4) Facilitate formation of other RNA
What does the protein first hypothesis state?
First of macromolecules was protein
What is the process for the protein first hypothesis?
1) Amino acids polymerize Abiotically
2) Amino acids collected into puddles
3) Heat from sun causes polymerization —> Proteinoids
4) Proteinoids have catalytic activity
What does the Clay hypothesis state?
RNA and proteins arose at the same time
What is the process for the Clay hypothesis?
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1) what makes u think I have any idea?!
2) I don’t think we actually leaned that…
What is a protocell?
A group of molecules surrounded by lipid membrane with no genetic information
How did the Protocells gain genetic material?
They “ate” RNA
What was done in the Oparin-Haladane experiment?
They made coacervates – put RNA and proteins in water and heated etc. and got synthetic protocells
