1. It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.   Hint First letter clue   2. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   First letter clue   3. It helps in the storage of water and several other substances, namely food, waste products and pigments. It also provides turgidity to the cell.   Hint       4. It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.   Hint       5. It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   Hint       6. It is a plastid, containing a pigment called chlorophyll. This chlorophyll captures energy from sunlight and helps in the manufacture of food by the process of photosynthesis.   Hint       7. 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.   First letter clue