1. It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.   Endoplasmic Reticulum   Nucleus   Nucleolus   Centrosome   Hint Half-n-half Clue   2. It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid). After cell division takes place, these chromatin fibres undergo certain structural changes, and are called chromosomes. These chromosomes carry the hereditary information of the genes.   Chromoplast   Nuclear Membrane   Nucleus   Nucleoplasm   Half-n-half 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.   Nucleoplasm   Nucleus   Nuclear Membrane   Nucleolus   Half-n-half Clue   4. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   Vacuole   Ribosome   Cytoplasm   Centrosome   Half-n-half Clue   5. It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).   Lysosome   Mitochondrion   Ribosome   Nuclear Membrane   Half-n-half Clue   6. It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.   Cytoplasm   Nucleus   Chromoplast   Centrosome   Hint       7. It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   Cell Membrane   Chloroplast   Lysosome   Cytoplasm   Hint