Before LUCA

Question 1

Chemical Evolution Hypothesis

Accepted Answer

Abiogenesis, lack of O2, chemical building blocks of life in atmosphere

Question 2

Muchison Meteorite

Accepted Answer

biological molecules came from outside Earth, D-Sugars and L-amino acids

Question 3

RNA World Hypothesis

Accepted Answer

RNA polynucleotide could replicate with itself (Acellular catalyst)

Question 4

Possible Acellular catalysts?

Accepted Answer

Clay mineral surfaces and hydrothermal vents

Question 5

Warm little ponds

Accepted Answer

Life began when meteorites leached elements into warm ponds

Question 6

Archean Membranes

Accepted Answer

Isoprene chains, phosphate, L-glycerol

Question 7

Are bacteria and archae related?

Accepted Answer

No, archae is more related to eukaryotes than to bacteria

Question 8

Oparin - Haldene Theory

Accepted Answer

Theory suggests simply organic materials formed and then ultraviolet made it complex

Question 9

Progressive, or escape hypothesis

Accepted Answer

Viruses arose from genetic elements that gained the ability to move between cells

Question 10

Regressive, or reduction hypothesis

Accepted Answer

Viruses evolved from complex cells that lost genetic information, adopting a parasitic lifestyle instead

Question 11

Virus-first hypothesis

Accepted Answer

Viruses predated cells and contributed to rise of cellular life

Alle Karten