1. It helps in the storage of water and several other substances, namely food, waste products and pigments. It also provides turgidity to the cell.   Vacuole   Cell Wall   Lysosome   Mitochondrion   Hint Hint       2. It is the house of all metabolic activities and functions in the cell. In other words, it contains most of the cell organelles, each of which perform a specific function.   Endoplasmic Reticulum   Ribosome   Cell Membrane   Cytoplasm   Half-n-half Clue   3. It provides protection, shape and rigidity to the cell. It is freely permeable, allowing substances in the form of solutions to enter and leave the cell without any hindrance.   Ribosome   Mitochondrion   Leucoplast   Cell Wall   Hint       4. It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.   Chloroplast   Endoplasmic Reticulum   Golgi Apparatus   Vacuole   Half-n-half Clue   5. It is a plastid. It helps in the storage of starch.   Cell Membrane   Mitochondrion   Chloroplast   Leucoplast   Half-n-half Clue   6. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   Chloroplast   Centrosome   Chromoplast   Cell Membrane   Half-n-half Clue   7. It is semi-permeable, allowing substances to enter and leave the nucleus of the cell. It also provides protection to the nucleus of the cell.   Nucleoplasm   Mitochondrion   Nuclear Membrane   Golgi Apparatus   Half-n-half Clue