Which one of the following is not double membranous structure?
Correct answer: A. Vacuole
- A. Vacuole
- B. Mitochondria
- C. Chloroplast
- D. Nucleus
Explanation
The correct answer is Vacuole because vacuoles are single membrane-bounded organelles, surrounded by a membrane known as the tonoplast. This differentiates them from double-membraned organelles such as mitochondria, chloroplasts, and the nucleus. Mitochondria have a double membrane structure crucial for their role in cellular respiration. Similarly, chloroplasts have a double membrane crucial for photosynthesis, and the nucleus is encased in a nuclear envelope composed of two membranes, playing a vital role in protecting genetic material.
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About Cell Structure and Function
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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