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CBSE Video lectures for download

     

=Define a cell. Who discovered cell?

=Who discovered first living cell?

=How does the cell of a onion peel look like?

=Who discovered nucleus in the cell?

=Who coined the term ‘protoplasm’ for the fluid substance of the cell?

=Cell theory

=Who gave the cell theory

=unicellular organisms

=cell organelles

=What is plasma membrane?

=Define osmosis.

=What is diffusion?

=What is a hypotonic solution?

=What is a isotonic solution?

=What is a hypertonic solution?

=What is a cell wall?

=What is nucleus?

=What is cytoplasm?

=Endoplasmic Reticulum

=What is Golgi apparatus

=What are Lysosomes?

=What are mitochondria?

=What are Plastids?

=What are Vacuoles?

=labelled diagram of a animal cell

=Labelled diagram of a plant cell

 

What are Lysosomes?

What are Lysosomes?

Lysosomes are a kind of waste disposal system of the cell. Lysosomes help to keep the cell clean by digesting any foreign material as well as worn-out cell organelles. Lysosomes are able to do this because they contain powerful digestive enzymes capable of breaking down all organic material. During the disturbance in cellular metabolism, for example, when the cell gets damaged, lysosomes may burst and the enzymes digest their own cell. Therefore, lysosomes are also known as the ‘suicide bags’ of a cell.





What are Lysosomes?


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