1. It is chiefly composed of a dense fluid. It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid).   Hint First letter clue   2. It has a double-walled structure. Its inner wall is produced into folds known as cristae. It is generally sausage-shaped.   First letter clue   3. It has a vesicular structure. It is formed when the substances produced in the endoplasmic reticulum are further processed in the golgi apparatus.   First letter clue   4. It is round in shape. It is contained in the nucleus of the cell.   First letter clue   5. It is a clear space filled with water or other substances in the form of solutions. It has a covering called tonoplast.   Hint       6. It is the largest cell organelle. It has a dense structure. It is spherical in shape.   Hint       7. It has numerous pores, making it semi-permeable. It is the covering of the nucleus of the cell.   First letter clue