1. 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.   Golgi Apparatus   Cell Wall   Chromoplast   Cytoplasm   Hint Half-n-half Clue   2. 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   Leucoplast   Chloroplast   Cell Wall   Hint       3. It is a plastid. It helps in the storage of starch.   Nucleolus   Nucleoplasm   Leucoplast   Chromoplast   Half-n-half Clue   4. It performs intracellular digestion. It also helps in destroying foreign substances.   Cell Wall   Lysosome   Vacuole   Chloroplast   Half-n-half Clue   5. It is a plastid, containing pigments such as xanthophyll (yellow in color) and carotene (orangish-red in color). These pigments impart color to flowers and fruits of plants.   Nucleus   Chromoplast   Nuclear Membrane   Centrosome   Half-n-half Clue   6. It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.   Vacuole   Nucleolus   Nucleoplasm   Endoplasmic Reticulum   Half-n-half Clue   7. It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   Centrosome   Mitochondrion   Cytoplasm   Nucleolus   Half-n-half Clue