UPSC Civil Services Model Paper 7

Lysosomes :
It is called the “suicidal bags” of the cell .
Hence statement 1 is correct.
It is also known as the is called the perinuclear dense bodies.
The lysosomal membrane is rich in Sialic acid.
Hence statement 2 is not correct.
They are absent in Erythrocytes .
Hence statement 3 is correct.
They are acidic in nature due to the presence of anabolic enzymes.
Hence statement 4 is not correct.
Acid phosphatase (Enzyme) is used as a marker for the lysosomes.
Sucrose density gradient centrifugation is used in the isolation of Liposomal fractions.
Functions of lysosomes:
Autolysis
Autophagy
Digestion
(intracellular and extracellular)
Gamori staining techniques are used to locate the lysosomes.
Phosphate esters and nucleases are the components of lysosomes.
They are considered the “garbage trucks ” of a cell because they remove all unwanted cellular materials.
White blood cells contain the most active lysosomes .
They are involved in Secretion .
They are found in Leukocytes .