Topic 4: I 4 Steps Of Abiogenesis Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What are the four steps of abiogenesis?

A

1)abiotic synthesis of monomers
2)synthesis of macromolecules
3)formation of photocells
4)appearance of self-replication

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A)abiotic synthesis of monomers
What are the 4 requirements for ABIOTIC SYNTHESIS

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

B)synthesis of macromolecules

A

-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.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

C)Formation of Protocells

A

Lipids spontaneously form vesicles (Vesicle is a container(vessel/vesicle)) (Lipids make pockets)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

C)formation of Protocells
How do organic polymers exhibit attributes of living cells?
What processes do they do?

A

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)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

4 steps of Abiogenisis
D)appearance of self replication
What appears in Protocells?
What is it capable of?

A

RNA=nucleic acid in protocells
Capable of -self replication
-catalyze protein synthesis: ribozymes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which came first DNA or RNA?
Which ones more stable?

A

RNA came first however DNA is more stable and it evolved later

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a catalyst?

A

Something that lowers the energy required to perform a process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly