In eukaryotic cells, where does DNA translation (protein synthesis from an mRNA template) take place?

• A. In the nucleus at the DNA template
• B. In the Golgi apparatus
• C. On ribosomes in the cytoplasm (including those bound to the rough endoplasmic reticulum)
• D. In the mitochondria only

Answer: (C)

Verified step by step guidance

1. Understand that translation is the process of synthesizing proteins from an mRNA template, which is a key step in gene expression.
2. Recall that in eukaryotic cells, transcription (making mRNA from DNA) occurs in the nucleus, but translation occurs elsewhere.
3. Identify the cellular structures involved in translation: ribosomes are the molecular machines that read mRNA and assemble amino acids into proteins.
4. Recognize that ribosomes can be free-floating in the cytoplasm or attached to the rough endoplasmic reticulum, both locations where translation occurs.
5. Conclude that translation does not happen in the nucleus, Golgi apparatus, or exclusively in mitochondria, but primarily on ribosomes in the cytoplasm and on the rough ER.