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 .