What is the main advantage of a broad host range vector?Broad host range vector का मुख्य लाभ क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: It can replicate in many speciesयह कई species में replicate हो सकता है
The direct answer is A: a broad host range vector can replicate in many different host species or types, provided its replication system is compatible with them. A vector is a DNA carrier, and its host range depends mainly on features such as its origin of replication and other elements recognised by the host. Reasoning step by step: choose a vector with a suitable broad-range replication system; introduce it into a permitted host; if that host recognises and supports the vector, copies can be maintained; the same vector may therefore be useful across several hosts. This gives flexibility in research and production, although it does not guarantee replication in every species. Option A is correct because it states the central advantage. Option B is wrong because a vector is itself a DNA molecule or carries DNA; having no DNA would remove its essential function. Option C is wrong because broad host range does not mean the vector is always toxic; toxicity depends on genes and context. Option D is wrong because vectors do not generally digest protein. Exam cue: broad host range means broad compatibility, not unlimited compatibility.सीधा उत्तर A है: broad host range vector कई अलग-अलग host species या प्रकारों में replicate कर सकता है, यदि उसका replication system उन hosts के साथ compatible हो। Vector एक DNA carrier है। उसका host range मुख्यतः ori और उन अन्य elements पर निर्भर करता है जिन्हें संबंधित host पहचान सकता है। क्रम समझें: broad-range replication system वाला vector चुनें; उसे अनुमत host में पहुँचाएँ; यदि host उसे पहचानकर support करे, तो उसकी copies बनी रह सकती हैं; इस कारण वही vector कई hosts में उपयोगी हो सकता है। इससे research और production में flexibility मिलती है, लेकिन इसका अर्थ हर species में निश्चित replication नहीं है। A सही है। B गलत है; vector DNA molecule या DNA carrying construct होता है, इसलिए DNA न होना उसके उद्देश्य के विपरीत है। C गलत है; broad range का अर्थ हमेशा toxic होना नहीं है। D गलत है; vector का सामान्य काम protein digest करना नहीं है। याद रखें: broad host range = अधिक compatibility, unlimited compatibility नहीं।
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