Question

Lysosomes are produced by
A. Mitochondria
B. Endoplasmic reticulum
C. Golgi Bodies
D. Leucoplasts

Answer 1

Hint:Lysosomes are tiny, spherical, sac-like structures which are evenly distributed in the cytoplasm. They contain powerful enzymes that are synthesized in the rough endoplasmic reticulum and sent to theGolgi bodies. These enzymes are then modified and again injected into the Lysosomes. Because of their functionality of “eating up”, lysosomes are generally known as the ‘digestive bags of cells’. In this aspect, the lysosomes are beneficial as they eat worn-out cell organs so that those could not damage other proper organs inside the cell.

Complete answer:
We know that the functions of lysosomes are associated with digestion and cleaning up of the cell. ButMitochondria is involved in energy production and related with the functionalities of respiration. Hence, this option is wrong.
The endoplasmic reticulum is associated with the production of proteins which are contained in enzymes. These enzymes are later packed in the lysosomes. But they are not produced by either of the smooth or the rough endoplasmic reticulum. Clearly, this option is also not correct.
It has been stated that the endoplasmic reticulum sends vesicles which are packed with enzymes. These vesicles are further fused with the Cis or forming face of Golgi complex and they empty their contents in the lumen. Then, they are modified at the Trans face of Golgi where ‘lysosomes’ are born.

Hence, this is the correct answer.

Note:The Golgi apparatus arises from the membrane of the smooth endoplasmic reticulum. The proximal Golgi saccules are formed by fusion of Endoplasmic Reticulum-derived vesicles while distal air saccules “give their all” to vesicle formation and disappear. Thus, Golgi saccules are being constantly and rapidly renewed.