Mitochondria and chloroplast are-
(a) semi-autonomous organelles
(b) formed by division of pre existing organelles and they contain DNA but lack protein synthesising machinery
Which one of the following options is correct?
- (b) is true but (a) is false
- (a) is true but (b) is false
- Both (a) and (b) are false
- Both (a) and (b) are correct
The Correct Option is B
Solution and Explanation
Mitochondria & Chloroplast: Semi-Autonomous Organelles
Mitochondria and chloroplasts are considered semi-autonomous organelles because they:
- Are formed by the division of pre-existing organelles.
- Contain their own DNA, which is distinct from nuclear DNA.
- Have their own protein-synthesizing machinery, including ribosomes and tRNA.
Thus, the statement "A is true and B is false" refers to the fact that mitochondria and chloroplasts can replicate independently within the cell, but they still rely on the cell's nucleus for many of their proteins, making them semi-autonomous.
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Concepts Used:
Eurkaryotic Cells - Golgi Apparatus
The Golgi apparatus is also known as the Golgi complex or the Golgi body. The term is derived from Camillo Golgi, the scientist who discovered the organelle. It can be found in all eukaryotic cells, including plants and animals. They are membrane-bound organelles found in the cell's cytoplasm.
Formation of acrosome: The acrosome is a component of the tip of animal sperms that aids in the digestion of the egg or ovum covering sheath during fertilisation. The Golgi complex produces it with the help of its vesicles.