Peroxisomes are membrane-bound organelles containing oxidative enzymes. Discovered by Christian de Duve in 1967 from spinach leaf homogenate. Found in both plants and animal cells, most abundant in liver and kidneys
Chloroplasts are green organelles found in plants and green algae. They contain chlorophyll a and b pigments for photosynthesis. Chloroplasts are 1-2 μm thick and 5-7 μm in diameter
Nucleus is a double-membrane-bound organelle in eukaryotic cells. Accounts for 10% of cell volume, typically 6 µm in diameter. Usually spherical or oblong, grayish in color. Found in all higher organisms, except erythrocytes and platelets
Golgi apparatus is a membrane-bound organelle in eukaryotic cells. Made up of flattened stacked pouches called cisternae. Contains approximately 4-8 cisternae, up to 60 in single-celled organisms. Structurally polarized with cis, medial, and trans faces
Organelle is a specialized subunit within a cell with specific function. Organelles can be membrane-bound or non-membrane-bound structures. Some structures extending outside cells are also considered organelles
Both are cell organelles for movement and protection. Human eye cannot see them. Found in both prokaryotes and eukaryotes