यदि एक पुनर्जियोजी डीएनए (recombinant DNA) सफलतापूर्वक प्रविष्ट हो जाता है लेकिन पोषी कोशिका में अभिव्यक्त (express) नहीं होता है, तो इसका कारण हो सकता है:

In blue-white screening, insertion of foreign DNA into the β-galactosidase gene results in:

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): DNA fragments from any source can be cloned into a plasmid. Reason (R): A plasmid can be transferred to other cells by gene transfer mechanisms such as transformation and transduction. In the light of the above statements, choose the most appropriate answer from the options given below: