1. It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.   Hint First letter clue   2. It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   First letter clue   3. 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.   First letter clue   4. 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   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 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.   Hint       7. It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.   Hint