The cell nucleus A Is usually 4 to 10 µm across B Is the site of RNA synthesis C Contains ribosome D Is surrounded by a single layered membrane E Contains nucleoli responsible for mitotic spindle formation The cell nucleus Correct Answer Is usually 4 to 10 µm across, Is the site of RNA synthesis, Contains ribosome Bissoy MCQ Team Aug 26, 2023 Basic MS Residency Anatomy Histology Introduction