1. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   Mitochondrion   Centrosome   Cell Wall   Nuclear Membrane   Hint Half-n-half Clue   2. 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.   Cytoplasm   Chromoplast   Ribosome   Mitochondrion   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.   Centrosome   Ribosome   Cytoplasm   Nuclear Membrane   Half-n-half Clue   4. It is a plastid. It helps in the storage of starch.   Cell Wall   Leucoplast   Nuclear Membrane   Nucleolus   Half-n-half Clue   5. It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.   Cell Membrane   Nucleus   Mitochondrion   Nucleolus   Half-n-half Clue   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.   Golgi Apparatus   Ribosome   Nucleoplasm   Chloroplast   Hint       7. It is the house of all metabolic activities and functions in the cell. In other words, it contains most of the cell organelles, each of which perform a specific function.   Cell Wall   Endoplasmic Reticulum   Cytoplasm   Lysosome   Half-n-half Clue