1. It is a plastid. It helps in the storage of starch.   Chloroplast   Leucoplast   Cytoplasm   Vacuole   Hint Half-n-half Clue   2. It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.   Golgi Apparatus   Nuclear Membrane   Ribosome   Lysosome   Hint       3. It performs intracellular digestion. It also helps in destroying foreign substances.   Chloroplast   Endoplasmic Reticulum   Vacuole   Lysosome   Half-n-half Clue   4. It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.   Nuclear Membrane   Nucleus   Nucleolus   Cytoplasm   Half-n-half Clue   5. It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   Nucleolus   Cell Membrane   Nucleus   Centrosome   Hint       6. 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.   Chromoplast   Cell Wall   Mitochondrion   Vacuole   Hint       7. It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   Chromoplast   Centrosome   Cell Membrane   Mitochondrion   Half-n-half Clue