Flashcards in Endosymbiotic Theory or Moulin Rouge Deck (21):
Eukaryotes evolved from a...
Prokaryotic ancestor! Either heterotrophic or chemotrophic
Most probably it was a __________ ancestor.
Heterotrophic Prokaryotic - because hetero are so damn efficient! Made lots of ATP
In the beginning cells had:
Nuclear envelope, ER, Golgi & Vacuoles/Vesicles
They did not have:
The prokaryote did what to the eukaryote?
Invaginated it and internal membranes formed
Was endosymbiosis a one-off?
NO - Serial Event
Endosymbiosis put simply?
Mutually beneficial relationship where one lives in the other.
Happened by these 2 posssible mechanisms:
1. Prok infected but didnt kill euk.
2. Euk ingested prok but didnt kill.
How did the euk ingest the prok?
The first event:
Mitochondrion entered eukaryote (HETEROTROPHIC eukaryote)
How did they each benefit?
Eukaryote received excess ATP from prok
Prok was provided high energy molecules (glucose)
The pair (euk+mit) succesfully...
Outcompeted all eukaryotes without mitochondria
The second event:
Prok entered eukaryote with mitochondria
In this relationship we add a drop of...
Golden sun! Photsynthetic prokaryote gives glucose to euk host.
They also became inseperable and the prokaryote grew up to be a...
How do we know this happened many times?
Red/green algae - different prok/same outcome
Brown algae - didn't ingest prok. Ingested autotrophic eukaryote with chloroplast!
Evidence of enodysmbiosis?
Size - Mitochondria & Chloroplasts same size as bacteria
T/F - Evidence - Mitochondria & chloroplasts have ribosomes in both.
T/F - Evidence - Mitochondria & chloroplasts have own DNA & own chromosome.
DNA & Chromosome in mitochondria and chloroplasts are...
Single & Circular (a la bacteria)