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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In E. coli, the main enzyme that elongates new DNA strands during replication is:
सही उत्तर: ख) DNA polymerase III
DNA polymerase III is the chief replicative enzyme in prokaryotes; DNA polymerase I removes RNA primers and fills the gaps.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The classic example of competitive inhibition is the inhibition of succinic dehydrogenase by:
सही उत्तर: क) Malonate
Malonate closely resembles the substrate succinate and competes with it for the active site of succinic dehydrogenase.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Enzymes that catalyse the joining of two molecules using energy from ATP hydrolysis (for example DNA ligase) belong to the class:
सही उत्तर: ग) Ligases
Ligases (synthetases) link two molecules coupled with ATP breakdown; lyases remove groups to form double bonds without hydrolysis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cholesterol is chemically classified as a:
सही उत्तर: ख) Steroid
Cholesterol is a sterol (steroid) with four fused carbon rings; it is the precursor of steroid hormones and vitamin D.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Vegetable oils are liquid at room temperature mainly because they contain a high proportion of:
सही उत्तर: क) Unsaturated fatty acids
Double bonds in unsaturated fatty acids introduce kinks that prevent close packing, lowering the melting point so oils stay liquid.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The most abundant protein in the animal world is:
सही उत्तर: क) Collagen
Collagen, the main structural protein of connective tissues, is the most abundant protein in animals (RuBisCO is the most abundant in the whole biosphere).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Adjacent nucleotides in a strand of DNA are joined by:
सही उत्तर: ग) Phosphodiester bonds
A phosphodiester bond links the 3' carbon of one sugar to the 5' carbon of the next through a phosphate; hydrogen bonds join the two strands.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following proteins possesses a quaternary structure?
सही उत्तर: घ) Haemoglobin
Quaternary structure needs two or more polypeptide subunits; haemoglobin has four (two alpha and two beta chains), while myoglobin and lysozyme are single chains.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If a cell in G1 phase contains 2C amount of DNA, what will be its DNA content at the end of S phase?
सही उत्तर: घ) 4C
DNA replicates during S phase, so the DNA content doubles from 2C to 4C, though the chromosome number stays the same.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An organism has 2n = 8 chromosomes. Ignoring crossing over, how many genetically different combinations of chromosomes are possible in its gametes due to independent assortment?
सही उत्तर: ख) 16
Number of combinations = 2^n, where n is the haploid number; here 2^4 = 16.
💬 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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