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  • Which one of the following has its own DNA?Option: 1 PeroxisomeOption: 2 Mitochondria</

Which one of the following has its own DNA?

Option: 1

Peroxisome


Option: 2

Mitochondria


Option: 3

Dictyosome


Option: 4

Lysosome


Answers (1)

best_answer

  • DNA or deoxyribonucleic acid is present in the chromosomes which are stuffed inside the core of the cell i.e. nucleus.

  • Endosymbiotic mutualistic relationships are thought to have led to the development of some cell organelles, making them endosymbionts. These organelles function as semi-autonomous organelles and replicate on their own whenever required.

  • This is due to the fact that they are thought to have originated as independent single-celled organisms that later evolved into larger eukaryotic cells.

  • However, mitochondria also have their own DNA which is known as the mitochondrial DNA (mtDNA). The inner membrane surrounds a matrix called the “mitochondrial matrix” which contains single circular DNA resembling prokaryotic DNA, unlike the double-stranded linear DNA of eukaryotes.

  • They divide by binary fission whenever necessary and function as semi-autonomous organelles due to the presence of their own DNA.

  • This DNA of about 5μ length is capable of self-replication. Thus mitochondria are genetically autonomous. There are also shreds of evidence to prove that genes also occur in mitochondria.

Hence, the correct option is (2).

 

Posted by

Divya Prakash Singh

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