Vacuoles are fluid filled sacs surrounded by a membrane called__________?
Correct answer: A. tonoplast
- A. tonoplast
- B. nuclear membrane
- C. cell membrane
- D. cell wall
Explanation
The tonoplast is the selectively permeable membrane surrounding a plant-cell vacuole and controlling movement of substances into and out of its fluid contents. The cell membrane surrounds the entire cell, whereas the nuclear membrane surrounds the nucleus, so neither is the vacuole membrane.
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