1. It has a double-walled structure. Its inner wall is produced into folds known as cristae. It is generally sausage-shaped.   Cell Membrane   Cell Wall   Nucleoplasm   Mitochondrion   Hint Half-n-half Clue   2. It has numerous pores, making it semi-permeable. It is the covering of the nucleus of the cell.   Secretory Granule   Ribosome   Rough Endoplasmic Reticulum   Nuclear Membrane   Half-n-half Clue   3. It contains most of the cell organelles. It is composed of a mixture of water and soluble organic & inorganic compounds.   Ribosome   Cytoplasm   Mitochondrion   Smooth Endoplasmic Reticulum   Half-n-half Clue   4. It is round in shape. It is contained in the nucleus of the cell.   Rough Endoplasmic Reticulum   Nucleolus   Nucleoplasm   Mitochondrion   Half-n-half Clue   5. It consists of an irregular network of double-walled tubular membrane. It does not have ribosomes attached to it.   Smooth Endoplasmic Reticulum   Nucleoplasm   Nuclear Membrane   Ribosome   Half-n-half Clue   6. It is made up of stacks of flattened membranous sacs. It mainly consists of vesicles, vacuoles and tubules.   Nucleoplasm   Centrosome   Ribosome   Golgi Apparatus   Hint       7. It is chiefly composed of a dense fluid. It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid).   Centrosome   Lysosome   Cell Membrane   Nucleoplasm   Half-n-half Clue