Which statement about the nucleolus is not true?
Correct answer: D. Hereditary center
- A. No membranous boundary
- B. Composed of two regions
- C. Site of ribosome synthesis
- D. Hereditary center
Explanation
The correct answer is Option D: Hereditary center. The nucleolus is not the hereditary center of the cell; that function is attributed to the nucleus, which houses the cell's DNA. The nucleolus is a non-membranous structure within the nucleus, responsible for producing and assembling ribosomal subunits. Options A, B, and C correctly describe the nucleolus's characteristics and functions, while Option D incorrectly attributes hereditary functions to it.
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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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