कृषि, पशु र वन विज्ञान B.Sc. Forestry प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Forestry प्रवेश
B.Sc. Forestry 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 cell theory, stating that all living organisms are composed of cells, was formulated by:
सही उत्तर: ख) Schleiden and Schwann
Botanist M. Schleiden (1838) and zoologist T. Schwann (1839) jointly proposed the cell theory; Virchow later added that cells arise from pre-existing cells.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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August Weismann opposed Lamarck's theory by experimentally cutting the tails of mice for many generations and proposed the theory of:
सही उत्तर: ग) Continuity of germ plasm
Weismann found tails did not shorten and proposed that only changes in the germ plasm, not the body (somatoplasm), are inherited.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 'coelacanth' Latimeria, often called a living fossil, is a:
सही उत्तर: क) Lobe-finned fish
Latimeria is a lobe-finned (crossopterygian) fish, a group thought to be related to the ancestors of land vertebrates.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Mendel chose the garden pea (Pisum sativum) for his experiments and studied how many pairs of contrasting characters?
सही उत्तर: घ) Seven
Mendel studied seven pairs of contrasting traits, such as tall/dwarf stem and round/wrinkled seed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many linkage groups are present in Drosophila melanogaster?
सही उत्तर: ग) 4
Drosophila has 2n = 8, i.e. 4 pairs of chromosomes, so it has 4 linkage groups.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a normal human female, how many Barr bodies are found in the nucleus of a somatic cell?
सही उत्तर: ख) One
A Barr body is an inactivated X chromosome; a normal XX female has one, since number of Barr bodies = number of X chromosomes minus one.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The enzyme reverse transcriptase, found in retroviruses such as HIV, synthesises:
सही उत्तर: ख) DNA from an RNA template
Reverse transcriptase copies the viral RNA genome into DNA, reversing the usual direction of transcription.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Transposons ('jumping genes') were first discovered in maize by:
सही उत्तर: घ) Barbara McClintock
Barbara McClintock discovered mobile genetic elements in maize and later received the Nobel Prize (1983).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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DNA fingerprinting, developed by Alec Jeffreys, is based mainly on the analysis of:
सही उत्तर: क) Variable number tandem repeats (VNTRs)
VNTRs (minisatellites) differ in repeat number between individuals and form the basis of DNA fingerprinting.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In recombinant DNA work, the technique that separates proteins by electrophoresis and detects them with antibodies is called:
सही उत्तर: ग) Western blotting
Southern blotting detects DNA, Northern blotting RNA, and Western blotting proteins using antibodies.
💬 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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