Acell's digestive enzymes are enclosed in a membrane bound organelle. how can these molecules function of a plasma membrane

A cell digestive enzymes are enclosed in a membrane bound organelles known as Lysosomes. Lysosome contains about 50 different types of enzymes which helping in breakdown of different types of biological molecules such as Protein, carbohydrates, nucleic acid and lipids.

Cells transporting the material into lysosome where digestive enzymes are present. Now the molecules are digested by enzymes after that these digested molecules are going back to the cytosol for use by the cell.

Enzymes which are present in lysosome require acidic environment to function in proper manner.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.