The ribosomal subunits present in 70S ribosomes are

30S and 60S

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30S and 50S

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40S and 60S

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30S and 40S

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Solution

The correct option is B 30S and 50S
In ribosomal unit 's' is the svedberg coefficient and it is a rate of sedimentation with the influence of density gradient.
Hence its not 50s + 30s = 80s, but its 50s + 30s =70s.
Therefore the right answer is option "B, 30S and 50S.

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