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I was thinking that even though I know how generally the cell works, I don't really have a feeling of how volatile it is. I want to know what is the lifetime/turnover rate of different constituents of the cell.

On the molecular level what are the lifetimes for various proteins including ribosome, lipids, carbohydrates, DNA and RNA. What about aminoacids, nucleotides?

On the organelle level what are the lifetimes of the mitochondria, golgi apparatus. Does nucleus or ER ever change if not during meiosis.

I understand that the lifetime depends on the context. For example, for DNA, cells that replicate, half-life is about one replication as a whole new strand is generated. In neurons, that don't replicate for decades it's not the case. But the DNA can't just sit there. It is constantly unraveled, transcribed, damaged and repaired. So it has a different time constant.

I am still very interested to know any specific numbers.

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