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NTA Abhyas NEET2020BotanyCell - The Unit of LifePractice

The ribosomes present in the cytoplasm of the causative organism of cholera and mitochondria of causative organism of malaria, respectively, are

Options

  1. A70S and 70S
  2. B70S and 80S
  3. C80S and 70S
  4. D80S and 80S

Correct answer

A. 70S and 70S

Step-by-step solution

Causative organism of cholera is a bacterium Vibrio cholerae. It is a prokaryote. The causative organism of malaria is Plasmodium which is a protozoan. It is a eukaryote. Ribosomes are the granular structures composed of RNA and proteins. They are not surrounded by any membrane and are seen as dense particles under the electron microscope. Ribosomes found in cytoplasm of eukaryotic organisms are 80S and those in cytoplasm of prokaryotic organisms are 70S, where S is the coefficient of sedimentation and is a measure

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