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Standard XII
Biology
Question

Which of the following statements is/are incorrect with reference to lysosomes?
  1. They are monomorphic and uniform in structure and function.
  2. They may be autophagic.
  3. They can digest proteins, nucleic acids, lipids and polysaccharides.
  4. They are filled with acid hydrolase and other enzymes.

A
They may be autophagic.
B
They are filled with acid hydrolase and other enzymes.
C
They can digest proteins, nucleic acids, lipids and polysaccharides.
D
They are monomorphic and uniform in structure and function.
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Solution
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Lysosomes are the small single membrane-bound organelle formed by Golgi apparatus and are rich in hydrolytic enzymes. They are polymorphic and may be of following types:
(a) Primary lysosomes are the newly formed.
(b) Hetero lysosomes are the digestive vacuoles, produced by fusion of primary lysosome and phagosomes.
(c) Residual lysosomes are the lysosomes having undigested materials.
(d) Autophagic lysosomes perform autophagy or autolysis.
They contain acid hydrolases which can digest proteins, nucleic acids, lipids and carbohydrates.
Thus, the correct answer is option B.

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