1. It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   Nucleolus   Chloroplast   Mitochondrion   Nucleus   Hint Half-n-half Clue   2. It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.   Mitochondrion   Leucoplast   Endoplasmic Reticulum   Cell Wall   Half-n-half Clue   3. 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.   Lysosome   Ribosome   Vacuole   Nucleoplasm   Half-n-half Clue   4. 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.   Nucleolus   Leucoplast   Chloroplast   Cell Wall   Hint       5. It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   Lysosome   Nucleus   Cell Membrane   Nucleolus   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).   Mitochondrion   Vacuole   Chromoplast   Ribosome   Half-n-half Clue   7. 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.   Golgi Apparatus   Chloroplast   Nuclear Membrane   Ribosome   Half-n-half Clue