Question

The discoverer of lysosomes is
A.Palade
B.de Duve
C.porter
D.Golgi

Answer 1

Hint: The scientist who worked on electron microscope had given the term lysosomes. According to him these are small vesicles bounded by a single membrane. They are spherical vesicles that contain hydrolytic enzymes that can break down many kinds of biomolecules.

Complete step by step answer:
 The Belgian scientist, named Christian de Duve, in 1955 observed lysosomes under the electron microscope through fractionation techniques. The word lysosome means loose or digestive body, and looks like small vesicles which contain about 50 enzymes in it. De Duve was the last of a group of eminent physiological chemists who, by the 1940s and 1950s , began to explore the subcellular organization of biochemical pathways and thus forged the emergence of Modern Cell Biology.
Additional information: Originally, de Duve has termed the organelle the ‘’suicide bags’’ or ‘’suicide sacs’’ of the cells, for their hypothesized role in apoptosis. However, it has since been concluded that they only play a minor role in cell death. De Duve won the Nobel prize in Physiology or medicine in 1974 shared with Albert Claude and George E Palade for the discovery.

Hence the correct answer is option(B)

Note: These lysosomes are generally present in animal cells, which can be rounded but are also irregular in shape. They help in intracellular digestion, which is performed under certain conditions. Within all animal cells, the lysosomes function as the sanitation department. It digests, recycles and disposes of such materials as worn out organelles and engulfed bacteria and viruses. Extracellular materials reach the lysosome mainly through endocytosis and phagocytosis, while a completely different process, autophagy mediates the delivery of intracellular materials.