The "m" in mRNA stands for messenger.
mRNA is created in the nucleus of a cell.
Here's a breakdown of why:
1. Messenger RNA (mRNA) carries genetic information from the DNA in the cell's nucleus to the ribosomes in the cytoplasm.
2. During a process called transcription, mRNA is synthesized in the nucleus.
3. The DNA serves as the master copy, and mRNA is created as a copy of a specific gene to carry the instructions for protein synthesis.
4. Once the mRNA is created in the nucleus, it travels out of the nucleus and into the cytoplasm where the ribosomes are located.
5. At the ribosomes, the information carried by the mRNA is used to assemble amino acids into a specific sequence, ultimately forming a protein.
Therefore, the correct answer to the question is: "messenger, nucleus."
