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In mitochondria there is a presence of ribosome which make protein but for making protein RNA is required . so I want to ask from where RNA comes for making protein.
There is a process called central dogma of life. In this process, DNA undergoes transcription to synthesize mRNA, transcription takes place inside the nucleus.
once mRNA is formed, it is transported through the rough endoplasmic reticulum
on RER, there are particles attached to the RER which itself is called ribosomes
Hence, these are the ribosomes which after getting released from the nucleus, travels in cytoplasm and the process of translation occurs in which the protein is synthesized from the mRNA.