1. It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).   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 controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.   Hint       4. 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       5. It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.   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 provides support to the cell. It also helps in the synthesis and transport of proteins and fats.   First letter clue