/sci/ - Science & Math

[Anonymous No.8796772]

Does anyone here understand how mitochondria were passed on to subsequent generations in the first eukaryotes? Early on mitochondria were just vacuole enclosed aerobic bacteria so it bothers me that these were somehow able to enter other eukaryotes where the original one underwent binary fission. Now one thing I've been thinking of is how Endorifta Persephone enters tubeworm larvae by infecting it and then triggering the worm's metamorphosis, but it doesn't seem like early mitochondria worked like that based on their structure.

[Anonymous No.8796777]

>>8796772
I think it has a lot to do with the ayy lmaos.

[Anonymous No.8796778]

>>8796777
Well I can't argue with trips. Aliens need to stop fucking with life.

[Anonymous No.8796785]

Ravioli ravioli give me the vacuoli

[Anonymous No.8797208]

>>8796772
>evidence for God/Creationism staring you in the face
>still atheist

[Anonymous No.8797286]

>>8797208
Where is your God now?

[Anonymous No.8797393]

>>8796772
They didn't need to enter the newly formed cell. More than one cyanobacteria could inhabit a protoeukaryotic cell at once and any daughter cells without "mitochondria" would've been outcompeted.

[Anonymous No.8797446]

>>8796785
Somehow underrated

[Anonymous No.8797453]

>mitochondria divide inside cell
>cells without mitochondria get outcompeted
>cells that have them divide and have mitochondria in them already

i pulled this out of my ass but you could've thought of it and not have made this thread

[Anonymous No.8797563]

>>8797453
>>8797393
Modern eukaryotes don't transfer organelles to daughter cells though, that's what I'm hung up on.

[Anonymous No.8797576]

>>8797563
>Modern eukaryotes don't transfer organelles to daughter cells
Hmm?

[Anonymous No.8798003]

>>8797576
Only part of the golgi apparatus is directly transferred to the daughter cell, I believe mitochondria are also only partially replicated during mitosis.

[Anonymous No.8798072]

>>8797453
>I'll pull some shit out of my ass because it usually works, without realizing it makes me look dumb and uneducated

Dunning-Kruger is alive and well.

[Anonymous No.8798141]

>>8798072
Ironically that was my attempt at an educated guess because we don't really know, but I'll admit I was being an asshole about it. I'll try to explain

>>8798003
Those aren't equal. A Golgi apparatus is just a bunch of vesicles that is fully coded by the cells DNA. However as you probably know mitochondria have their own DNA. Not enough to be independent, if I'm not mistaken they can code for 13 proteins, the rest has to come from the cells DNA. This wasn't always the case, when this relationship began they could probably divide inside the cell and the cell would have a defense mechanism against them becoming too numerous, eventually leading to a configuration that would be efficient in a symbiotic way.

http://bioscience.jbpub.com/cells/MBIO4134.aspx
>Mitochondria must be duplicated during the cell cycle and segregated to the daughter cells.
That's because of their unique DNA. There's no other way. Also I believe it's been shown that muscle cells that are trained actually have more mitochondria thus proving that you don't even need cell division to have mitochondrial division.
Now the key sentence is
>Mitochondrial segregation to daughter cells is also stochastic.
which I believe can answer your question. In the beginning it might have happened at random, then cells that had them outcompeted cells that didn't, but it's all speculative.

[Anonymous No.8798155]

>>8798141
also quick fix, the article talks about segregation being stochastic as in 'we don't know which mitochondrion with which particular set of dna will be inherited' and i can't really say i know a lot about how cells organize their organelles to be distributed in a 1:1 manner but i assume it didn't incorporate foreign bacteria overnight