In Nostoc $/$ bacteria $/$ prokaryotes the ribosomes are

50

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80

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70

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30

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Solution

The correct option is C $70$ S
In most bacteria, the most numerous intracellular structure is the ribosome which is the site of protein synthesis in all living organisms. All prokaryotes have 70S ribosomes while eukaryotes contain larger 80S ribosomes in their cytosol. The 70S ribosome is made up of a 50S and 30S subunits.
So C is the correct option.

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