Factory of ribosomal synthesis is:
Correct answer: C. Nucleolus
- A. Cytoplasm
- B. Nucleus
- C. Nucleolus
- D. Endoplasmic reticulum
Explanation
The nucleolus is a distinct structure within the nucleus, primarily responsible for the synthesis of ribosomal RNA (rRNA) and the assembly of ribosomal subunits. This is why it is referred to as the 'factory' of ribosomal synthesis. The cytoplasm, while essential for many cellular processes, does not synthesize ribosomes. The nucleus contains the nucleolus, but ribosomal synthesis occurs specifically in the nucleolus itself. The endoplasmic reticulum is involved in protein and lipid synthesis, but not in the synthesis of ribosomal subunits.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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