What is the role of a multiple cloning site (MCS) in DNA cutting?DNA cutting में multiple cloning site (MCS) का क्या role है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: It provides several restriction-enzyme recognition sitesIt provides several restriction-enzyme recognition sites
The governing concept is the design of a cloning vector. A multiple cloning site, or MCS, is a short engineered region containing several distinct restriction-enzyme recognition sequences, usually arranged close together. This gives a researcher flexibility to select an enzyme or enzyme pair that cuts the vector at a suitable location and produces ends compatible with the insert. The chosen sites must not disrupt essential vector functions and should ideally occur only where intended. Option A is correct. The MCS does not digest enzymes, convert DNA into water, or perform translation; therefore options B, C, and D confuse unrelated biochemical processes.इसका मुख्य सिद्धान्त cloning vector की संरचना और उसमें उपलब्ध restriction sites है। Multiple cloning site या MCS एक छोटा engineered region होता है जिसमें कई अलग-अलग restriction enzymes की recognition sequences पास-पास स्थित होती हैं। इससे researcher को उपयुक्त enzyme या enzyme pair चुनने की सुविधा मिलती है, ताकि vector को सही स्थान पर काटकर insert के compatible ends बनाए जा सकें। चुनी गई sites vector के आवश्यक genes को बाधित नहीं करनी चाहिए और सामान्यतः इच्छित स्थान पर ही उपस्थित होनी चाहिए। इसलिए विकल्प A सही है। MCS enzymes को digest नहीं करता, DNA को water में नहीं बदलता और protein translation नहीं करता; अतः B, C और D गलत हैं।
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