Which one of the following cell organelles does NOT possess its own ge

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Which one of the following cell organelles does NOT possess its own genetic material encoding proteins ?

Ribosome
Nucleus
Mitochondria
Chloroplast
This question was previously asked in
UPSC NDA-1 – 2019
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The correct answer is A) Ribosome.
Cell organelles like the nucleus, mitochondria, and chloroplasts contain their own DNA which encodes some of their proteins. Ribosomes are composed of ribosomal RNA (rRNA) and proteins, but they do not possess their own DNA. The genes for ribosomal RNA are located in the nuclear DNA, and ribosomal proteins are synthesized in the cytoplasm based on mRNA transcribed from nuclear DNA.
Mitochondria and chloroplasts are believed to have originated from endosymbiotic bacteria, which is why they retained their own circular DNA and protein synthesis machinery (including ribosomes distinct from cytoplasmic ribosomes). The nucleus contains the vast majority of a eukaryotic cell’s genetic material in the form of linear DNA chromosomes. Ribosomes are responsible for protein synthesis, translating mRNA into protein sequences, but they do not carry the genetic code for their own proteins or rRNA in a dedicated genome within the organelle itself.

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