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Pleomorphism of Lysosomes

  Pleomorphism of Lysosomes Lysosomes show pleomorphism, which means they occur in many different forms according to their functional state. They are not always identical in shape, size, or contents. Their appearance changes depending on whether they are newly formed, involved in digestion, or storing undigested waste materials.  Lysosomes are membrane-bound organelles containing hydrolytic enzymes. These enzymes digest proteins, lipids, carbohydrates, nucleic acids, and other cellular materials. Since lysosomes perform different digestive functions inside the cell, they appear in different structural forms. This property is called pleomorphism.  The main pleomorphic forms of lysosomes are primary lysosomes, secondary lysosomes, autophagic vacuoles, and residual bodies. Primary lysosomes are newly formed lysosomes produced by the Golgi apparatus. They contain inactive hydrolytic enzymes and have not yet taken part in digestion. They are small, spherical vesicles surround...

MCQ BIOLOGY2023-01

  1. Which cells have routinely used to understand structure of plasma membrane? a) Neurons                    b) Mylein cells c) RBC                         d) Stem cells   2. Cholesterol contributes to which of the following properties of biological membranes of animals? a) Membrane rigidity   b) Membrane fluidity c) Membrane permeability d) Membrane osmolarity   3. Cell membrane is always a) Static condition b) Dynamic condition c) Partially static condition      d) Fragmented structure   4. Which of the following statements concerning biological membrane is correct? a) Aquaporins are hollow pore b) Lipid composition of two layers of the membrane equilibrate c) The membrane is most fluid at the surface d) Fli...

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