1. Mitochondrion   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.   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.   It is a plastid. It helps in the storage of starch.   It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   Hint Half-n-half Clue   2. Ribosome   It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.   It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).   It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.   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.   Half-n-half Clue   3. Leucoplast   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.   It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.   It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.   It is a plastid. It helps in the storage of starch.   Half-n-half Clue   4. Golgi Apparatus   It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.   It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).   It performs intracellular digestion. It also helps in destroying foreign substances.   Hint       5. Lysosome   It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   It is a plastid. It helps in the storage of starch.   It performs intracellular digestion. It also helps in destroying foreign substances.   It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.   Half-n-half Clue   6. Cell Membrane   It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.   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.   It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   Hint       7. Nuclear Membrane   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.   It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   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.   It helps in the storage of water and several other substances, namely food, waste products and pigments. It also provides turgidity to the cell.   Half-n-half Clue