Cell Biology

Learn what ribosomes are, how their rRNA-protein structure enables protein synthesis, how 70S and 80S ribosomes differ, and where ribosomes occur in cells.

Learn what centrioles are, how their ninefold microtubule structure is organized, how they differ from centrosomes, duplicate during the cell cycle, and contribute to cell division and cilia formation.

Learn what peroxisomes are, their structure and major functions in lipid metabolism and redox control, how they form, their roles in plants, and related disorders.

Learn what vacuoles are, their structure and major types, how they function in cells, and how vacuoles differ across plant, fungal, protist, and animal cells.

Cellular junctions connect cells to neighboring cells or the extracellular matrix. Learn their types, structure, proteins, functions, and examples.

Learn what plastids are, how chloroplasts, chromoplasts and leucoplasts differ, their structure, functions, development, DNA, and origin in plant cells.

Learn what cell disruption is, how mechanical, physical, chemical, and enzymatic methods work, and how cell type, product stability, scale, and downstream processing guide method selection.

Learn about blood cells, including red blood cells, white blood cells, and platelets, their structure, functions, formation, lifespan, and blood-count basics.

Learn what endocytosis is, how cells form endocytic vesicles, its major types and pathways, key functions, examples, and differences from exocytosis.

Learn what white blood cells (leukocytes) are, how the five major types differ, where they develop, how they protect the body, and what WBC counts mean.