1. It has a double-walled structure. Its inner wall is produced into folds known as cristae. It is generally sausage-shaped.   Chromoplast   Smooth Endoplasmic Reticulum   Mitochondrion   Centrosome   Hint Half-n-half Clue   2. It is chiefly composed of a dense fluid. It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid).   Rough Endoplasmic Reticulum   Leucoplast   Nucleoplasm   Cell Membrane   Half-n-half Clue   3. It is a green-colored plastid. It contains a pigment called chlorophyll.   Mitochondrion   Chloroplast   Nucleus   Centrosome   Hint       4. It is a plastid that is colored differently in different cells. It contains pigments such as xanthophyll (yellow in color) and carotene (orangish-red in color).   Cytoplasm   Chromoplast   Rough Endoplasmic Reticulum   Smooth Endoplasmic Reticulum   Half-n-half Clue   5. It has a living, flexible and thin structure. It possesses fine pores, making it semi-permeable. It is chiefly composed of lipo-proteins.   Cell Wall   Cell Membrane   Lysosome   Vacuole   Hint       6. It has numerous pores, making it semi-permeable. It is the covering of the nucleus of the cell.   Nucleus   Chromoplast   Nucleoplasm   Nuclear Membrane   Half-n-half Clue   7. It contains most of the cell organelles. It is composed of a mixture of water and soluble organic & inorganic compounds.   Smooth Endoplasmic Reticulum   Cytoplasm   Secretory Granule   Mitochondrion   Half-n-half Clue