How much RNA is there in a cell?

[DrCl]

Hello,

Can someone please tell me how much total RNA is found in a mammalian cell? And of it, what percentage is coding RNA?

Thanks!!!!!!!

[rtblue]

well…. the RNA and DNA amounts of a cell will vary, from organism to organism, please give us an organism.

[Yasaman.herandy]

Hey,
I know the RNA in chloroplast and mitochondria are different from the RNA in cytoplasm, but is the RNA in chloroplast different from the one in mitochondria?

[JackBean]

quote Yasaman.herandy:

Hey,
I know the RNA in chloroplast and mitochondria are different from the RNA in cytoplasm, but is the RNA in chloroplast different from the one in mitochondria?

Definitelly, the DNA in both organelles codes for other genes, so you must have other RNA as well 😉

[Yasaman.herandy]

I asked the same question from my biology teacher. He said, the mitochondrial ribosomes, the chloroplast ribosomes & the bacterial ribosomes are so similar that if you (For example) take the little subunit of ribosome from mitochondria & the large subunit from chloroplast & give it to a bacteria it will be able to produce protein ❗

[JackBean]

Well, that’s a little bit other question 😉
The point you are asking now is, whether the homologous sequences are similar enough to be able to complement each other.
I was answering, whether the complete chromosomes are similar.

Both posts are correct. (Althrough, I think, that not whole ribosome is coded by mitochondrion/plastid). My point is, that plastids and mitochondrion are coding for different proteins (e.g. photosynthesis aparathus in chloroplast × Calvin cycle enzymes in mitochondrion) and also the dependence of these organels on nuclear gene transcription is various in different organisms 😉
(there was some picture in Alberts’ Cell Biology regarding, what genes are coding chromosomes in (mitochondria/plastids?) of different species)

[Yasaman.herandy]

Guess I was a bit confused. Thanks for the help & sorry for the awful English 😉

[JackBean]

You’re welcome. I hope, I’ve helped 😉

[Author]

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