कृषि, पशु र वन विज्ञान B.Sc. Ag र B.V.Sc. & A.H. प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Ag र B.V.Sc. & A.H. प्रवेश
B.Sc. Ag & B.V.Sc. Entrance · Agriculture, Veterinary & Forestry Entrance
२,४९३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि, पशु र वन विज्ञान प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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The Ti plasmid, widely used as a vector for genetic engineering of dicot plants, is obtained from:
सही उत्तर: क) Agrobacterium tumefaciens
Agrobacterium tumefaciens causes crown gall by transferring T-DNA of its tumour-inducing (Ti) plasmid into plant cells; disarmed Ti plasmids are used as vectors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In agarose gel electrophoresis, DNA fragments move towards the:
सही उत्तर: ख) Anode, because DNA is negatively charged
The phosphate backbone makes DNA negatively charged, so fragments migrate to the positive electrode (anode), smaller ones moving faster.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The system of binomial nomenclature was introduced by:
सही उत्तर: ख) Carolus Linnaeus
Carolus Linnaeus popularised naming each species with two words (genus + specific epithet), for example in Species Plantarum (1753).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The theory that life originated on earth through chemical evolution of non-living molecules in a primitive reducing atmosphere was proposed by:
सही उत्तर: ग) Oparin and Haldane
A.I. Oparin and J.B.S. Haldane independently proposed that the first life arose from simple organic molecules formed in a reducing atmosphere.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which early human species is called the 'handy man' because it is believed to have made the first stone tools?
सही उत्तर: घ) Homo habilis
Homo habilis ('handy man') lived about 2 million years ago, had a brain of about 650-800 cc and made simple stone tools.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The founder effect, in which a few individuals start a new population with different allele frequencies, is a form of:
सही उत्तर: ग) Genetic drift
The founder effect is a chance change in allele frequency due to a small founding sample, i.e. a special case of genetic drift.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The variety of finches on the Galapagos Islands, each with beaks suited to different foods, is an example of:
सही उत्तर: क) Adaptive radiation
From one ancestral seed-eating finch many forms evolved to fill different niches in one area, which is adaptive radiation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Charles Darwin's book 'On the Origin of Species' was published in:
सही उत्तर: ग) 1859
Darwin published his theory of evolution by natural selection in 'On the Origin of Species' in 1859.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The haploid human genome contains approximately how many base pairs?
सही उत्तर: ग) 3 x 10^9
The Human Genome Project found about 3 billion (3 x 10^9) base pairs in the haploid human genome.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A frameshift mutation results from:
सही उत्तर: ग) Insertion or deletion of a nucleotide
Adding or removing a base (not in multiples of three) shifts the reading frame, changing every codon read after the mutation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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