MCQ
Nucleolus in eukaryotic cells is
- AVisible in metaphase
- BThe site for synthesis of $RNA$ polymerase
- CBounded by a memebrane
- ✓The side of packaging of $rRNAs$ with ribosomal proteins
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$I.$ Double layered
$II.$ Fluid contained in it reduces the friction on the lung surface
$III.$ Its outer layer is in contact with thoracic wall
$IV.$ Its inner layer is in contact with lungs