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  • Secondary Lysosomes are formed when:Option: 1 lysosomes with undigested food material fuse with the plasma membrane and remove the debris through exo

Secondary Lysosomes are formed when:

Option: 1

lysosomes with undigested food material fuse with the plasma membrane and remove the debris through exocytosis


Option: 2

lysosomes with food material fuse with the plasma membrane and take the food in through endocytosis


Option: 3

when the food vacuole (phagosome) fuses with lysosome.


Option: 4

None of these


Answers (1)

best_answer

 

 

Components of the Endomembrane System: Lysosomes and Vacuoles -

Lysosomes

  • These are single membrane bound round or spherical organelles that function as digestive component and organelle-recycling facility of animal cells. 
  • They are not found in the plant cells. 
  • These were discovered by Christian de Duve in 1955. 
  • They contain hydrolytic enzymes that function at the acidic pH. 
  • Due to the presence of hydrolytic enzymes, they are also called suicidal bags. 

Types of Lysosomes:
Lysosomes can occur in different forms within the same cell. This phenomenon is called polymorphism. There are four types of lysosomes:

(1) Primary Lysosomes: They are newly formed vesicles that are smaller in size and contain granules of hydrolytic enzymes.
(2) Secondary Lysosomes: These are formed when the food vacuole (phagosome) fuses with lysosome. The digestion of food occurs in here and the undigested food remains in the secondary lysosome.
(3) Residual Bodies: These are the lysosomes with undigested food material. They fuse with the plasma membrane and remove the debris through exocytosis.
(4) Autophagic Vacuoles: When a number of primary lysosomes fuse to clear the worn-out organelle, autophagic vacuoles are formed. 


 

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Secondary Lysosomes are formed when the food vacuole (phagosome) fuses with
lysosome. The digestion of food occurs in here and the undigested food remains in the
secondary lysosome.

Posted by

Gaurav

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