1. 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.   Cell Wall   Cell Membrane   Nucleoplasm   Nuclear Membrane   Hint Hint       2. 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.   Mitochondrion   Chloroplast   Nuclear Membrane   Ribosome   Half-n-half Clue   3. 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.   Nucleolus   Lysosome   Chromoplast   Golgi Apparatus   Half-n-half Clue   4. 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.   Leucoplast   Lysosome   Nucleoplasm   Endoplasmic Reticulum   Half-n-half Clue   5. 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.   Chloroplast   Nuclear Membrane   Cell Wall   Nucleoplasm   Hint       6. It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).   Ribosome   Nucleus   Vacuole   Nuclear Membrane   Half-n-half Clue   7. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   Lysosome   Cytoplasm   Centrosome   Cell Membrane   Half-n-half Clue