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How does DNA know what work to do in each cell?

A copy of DNA is contained in the nucleus of all 37.2 trillion cells. Theoretically, these cells all have the same blueprint, so they have the same functionality.So how DNA For example, do you know if it is in a blood cell or a sensory cell? How do you know which genes need to be “switched on”? How do cells know and perform their functions?

Like everything related to DNA, it is a multifactorial and highly regulated process.In humans and other organisms Eukaryotic cells A concept called the “central dogma” describes how DNA acts as an instruction manual. DNA informs messenger RNA (mRNA) and is used as a roadmap for protein production. Therefore, transcribing the correct portion of DNA into mRNA is only the first step in ensuring that the cell has all the proteins it needs.

How does DNA know what work to do in each cell?

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