The site of protein synthesis is the:

**The reasoning** Think of protein synthesis like building a house. The **nucleus** holds the blueprints (DNA), but the actual construction happens elsewhere. The blueprints are copied into mRNA (messenger RNA), which then travels out of the nucleus to the **ribosome** — the cellular factory where proteins are assembled. Ribosomes read the mRNA code and link amino acids together in the correct sequence to form proteins. This process is called **translation**. So ribosomes are literally the workbenches where proteins are built, piece by piece. **Why the wrong options tempt you** - **Nucleus (A)** — You might pick this because DNA is here, and DNA contains genetic information for making proteins. But the nucleus only *stores* instructions; it doesn't build proteins. - **Golgi body (C)** — This one modifies and packages proteins *after* they're made, like a post-office sorting parcels. - **Lysosome (D)** — This actually *breaks down* proteins and waste materials — the opposite of building them! **Quick takeaway** Nucleus = blueprint storage; Ribosome = construction site where proteins are actually assembled from amino acids.