निम्नलिखित में से कौन सा कोशिकीय घटक प्रोकैरियोटिक कोशिकाओं में अनुपस्थित होता है?

Which one of the following is the site for active ribosomal RNA synthesis?

The cell wall of fungi is primarily composed of which substance?

Which of the following statements is/are correct? I. The cell walls permit the cells of plants, fungi, and bacteria to withstand very dilute external media without bursting. II. Cellulose is a complex substance and provides structural strength to plants.