Assertion :Peptidyl transfer site is contributed by larger sub-unit of ribosome Reason: The enzyme peptidyl transferase is contributed by both 23S and 16S ribosomal sub-units

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The large ribosomal subunit contains the site of catalysis—the peptidyl transferase (PT) center—which is responsible for making peptide bonds during protein elongation and for the hydrolysis of peptidyl-tRNA (pept-tRNA) during the termination of protein synthesis. However, the enzyme is not contributed by the 16S ribosomal subunit as it is part of the 30S ribosomal unit.

So the correct option is 'Assertion is correct but Reason is incorrect'.

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