1. 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.   Leucoplast   Centrosome   Chromoplast   Cell Wall   Hint Half-n-half Clue   2. It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.   Mitochondrion   Leucoplast   Cell Membrane   Cell Wall   Half-n-half Clue   3. 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.   Nucleus   Chloroplast   Ribosome   Cytoplasm   Half-n-half Clue   4. 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.   Nucleoplasm   Mitochondrion   Chromoplast   Centrosome   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.   Cell Membrane   Endoplasmic Reticulum   Nuclear Membrane   Chromoplast   Half-n-half Clue   6. It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.   Mitochondrion   Nucleolus   Cytoplasm   Endoplasmic Reticulum   Half-n-half Clue   7. It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).   Nuclear Membrane   Nucleus   Chloroplast   Ribosome   Half-n-half Clue