Topic 4: I 4 Steps Of Abiogenesis Flashcards
What are the four steps of abiogenesis?
1)abiotic synthesis of monomers
2)synthesis of macromolecules
3)formation of photocells
4)appearance of self-replication
A)abiotic synthesis of monomers
What are the 4 requirements for ABIOTIC SYNTHESIS
1)little or no free oxygen (oxygen makes bonds break, which we DON’T want)
2)source of energy
3)presence of chemical building blocks (CHON)(carbon, hydrogen, Oxygen, and nitrogen)
4)Time: for molecules to react to one another
B)synthesis of macromolecules
-formation of polymers from monomers (protein or RNA). (MONOMERS BECOME POLYMERS)
-monomers polymerize on hot sand or rock. (THEY POLYMERIZE ON HOT SAND AND ROCK)
-negative ions bond monomers.
C)Formation of Protocells
Lipids spontaneously form vesicles (Vesicle is a container(vessel/vesicle)) (Lipids make pockets)
C)formation of Protocells
How do organic polymers exhibit attributes of living cells?
What processes do they do?
They spontaneously form vesicles
They perform
1)osmosis. (Diffusion of molecules through semi-permeable barriers)
2)homeostasis (remember from anatomy, almost everything needs homeostasis to exist)
3)divide. (Poly-many-divide into many)
4 steps of Abiogenisis
D)appearance of self replication
What appears in Protocells?
What is it capable of?
RNA=nucleic acid in protocells
Capable of -self replication
-catalyze protein synthesis: ribozymes
Which came first DNA or RNA?
Which ones more stable?
RNA came first however DNA is more stable and it evolved later
What is a catalyst?
Something that lowers the energy required to perform a process