Endosymbiotic Origin of Eukaryotes

Question 1

Endosymbiosis is a

Answer 1

well-supported hypothesis

Question 2

Endosymbiosis implies that mitochondria and chloroplast arose from?

Answer 2

symbiotic association of prokaryotes within another type of cell (primitive eukaryotes)

Question 3

the eukaryotes cell is?

Answer 3

chimeric

Question 4

chimeric because?

Answer 4

• similar lipids and energy metabolism to bacteria
• transcription and translation machinery most similar to archea
• phylogenitically closer to Archaea

Question 5

first hypothese that exist to explain the formation of the eukaryotic cell?

Answer 5

Eukaryotes began as a nucleus-bearing lineage that later acquired mitochondria
and chloroplasts by endosymbiosis

Question 6

second hypothesis that exist explain the formation of the eukaryotic cell

Answer 6

Eukaryotic cells arose from intracellular association between a H2-producing
bacterium (the symbiont), which gave rise to mitochondria, and an H2-
consuming archaeal host (b). The archaeal host later developed a nucleus

Question 7

difference entre les deux?

Answer 7

la deuxieme hypothese le nucleus est acquis ds la premiere il st deja la

Question 8

ds la deuxieme théorie le chloroplast?

Answer 8

est engulfed apres alors que mitochondria va apparaittre dedans