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Which of these statements is not true about ribosomes?

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Which of these statements is not true about ribosomes?

(a) They are bound by a single membrane

(b) They are composed of RNA and proteins

(c) They were first observed by George Palade

(d) The small subunit of the prokaryotic ribosome is 30S

I got this question in unit test.

I would like to ask this question from Eukaryotic Cells and it’s Organelles in section Cell : The Unit of Life of Biology – Class 11

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The correct option is (a) They are bound by a single membrane

The best explanation: Ribosomes are not bound by a membrane. They are made of RNA and proteins. Ribosomes were first observed by George Palade. The small subunit of the prokaryotic ribosome is 30S.

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