Which of the following offers an active barrier between the cell content and their environment by allowing only selective substances to pass through it?
Correct answer: B. Plasma membrane
- A. Cell wall
- B. Plasma membrane
- C. Nuclear membrane
- D. Vacuole
Explanation
Selectively permeable means only substances that are needed in the cell are allowed to pass through Option A: Cell wall is fully permeable Option B: Plasma membrane (cell membrane) is partially permeable and allows only those substances to pass through which are required by the cell Option C: It is the membrane of the nucleus and allows only required substances to pass through to the nucleus Option D: A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance. Sometimes a single vacuole can take up most of the interior space of the plant cell
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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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