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