1. It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   Mitochondrion   Chromoplast   Cell Membrane   Lysosome   Hint Half-n-half Clue   2. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   Cell Membrane   Centrosome   Nucleolus   Nuclear Membrane   Half-n-half Clue   3. It is a plastid. It helps in the storage of starch.   Mitochondrion   Leucoplast   Endoplasmic Reticulum   Nucleoplasm   Half-n-half 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.   Nucleus   Chromoplast   Leucoplast   Cytoplasm   Half-n-half Clue   5. 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   Mitochondrion   Chloroplast   Nuclear Membrane   Half-n-half Clue   6. 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 Membrane   Chromoplast   Ribosome   Cytoplasm   Half-n-half Clue   7. 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   Nucleus   Endoplasmic Reticulum   Nucleolus   Hint