Question

How is it possible that a given mRNA in a cell is found throughout the cytoplasm but the protein that it encodes is only found in a few specific regions?

Accepted Answer

Hi everybody. Let's take a look at this practice problem together. Which of the following best describes why M RNA is position in a cell differs from the intracellular protein in, in codes. So recall that in a cell, M R N A is made in the nucleus, it is then transported to the cytoplasm where it is translated and the proteins are made. So let's take a look at our options is the reason why their positions differ a both M R N A and the proteins it encodes are delivered to certain locations. Although their delivery times may vary. Well, we know that proteins are not delivered, they are made where they are needed by free ribosomes. Therefore, this answer is not the correct one. C M RNA is larger and more complex than the protein. It encodes making it difficult to transport to specific regions. Well, we know that M RNA gets transported to the cytoplasm. So it moves from the nucleus to the cytoplasm. Therefore, c is also not the correct answer. Then we've got d the transport of M RNA and proteins is a passive process that occurs randomly in the cell. Well, we know that the process is not passive recall that it is highly coordinated. Therefore, D is not the answer either. Therefore, the correct answers. Option B M R N A is delivered to the regions where it's needed. Whereas intracellular proteins are immediately produced there. So M R N A is present all over the cytoplasm as it gets transported to where it's needed. And the proteins however, are made only at the places they are needed. So B is the correct answer. Alright, everybody, I hope you found this helpful and I'll see you soon for the next practice problem.

How is it possible that a given mRNA in a cell is found throughout the cytoplasm but the protein that it encodes is only found in a few specific regions?

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