context: A vacuole is a space in a cell filled with fluid (cell sap in English) in the form of a cavity covered by a membrane (tonoplast). This liquid is water and in it dissolved substances such as enzymes, lipids, alkaloids, mineral salts, acids, and bases. In addition, vacuoles also contain organic acids, amino acids, glucose, and gas. The vacuole is found in all plant cells but is not found in animal cells and bacteria, except in low-level unicellular animals.
question: What is the vacuole membrane?
answers.text: space in a cell filled with fluid (cell sap in English) in the form of a cavity covered by a membrane