RNA synthesis in nucleus participate in protein synthesis in

✅ Explanation: While RNA is synthesized in the nucleus, it is transported to the cytosol where it is translated into proteins by ribosomes. Ribosomes are the sites of protein synthesis and are found in the cytosol.

📌 Other Options Explanations:
-Nucleus: brain of cell, contain genetic material DNA or RNA,
-Chloroplast : site of photosynthesis
-Spherosome: only present in plant cell