Q.4
ICAR AIEEA PG Agronomy 09 July 2023 (Shift 1) Paper
MCQ (Single Correct) +4 −1
English हिन्दी
The complex which is specifically inhibited by SHAM in the electron transport chain is :
इलेक्ट्रॉन परिवहन श्रृंखला (ETC) में SHAM द्वारा विशिष्ट रूप से संदमित होने वाला कॉम्प्लेक्स कौन सा है?
EXPLANATION Plant Physiology, Photosynthesis, Transpiration and Abiotic Stresses in Crops
  • In plant mitochondria, in addition to the standard cytochrome pathway, there exists a cyanide-resistant respiratory bypass catalyzed by Alternative Oxidase (AOX).
  • AOX accepts electrons directly from the ubiquinone pool (branching at Complex III) and reduces oxygen to water without proton translocation across the inner membrane.
  • SHAM (Salicylhydroxamic acid) is a specific inhibitor of the Alternative Oxidase (AOX) pathway. While cyanide and azide inhibit Complex IV (cytochrome c oxidase), SHAM specifically inhibits the ubiquinol:oxygen oxidoreductase (AOX) branch.
  • In standard multiple choice options where complexes are listed, Option 3 corresponds to this bypass associated with Complex III/AOX branching.
  • पादप माइटोकॉन्ड्रिया में सामान्य साइटोक्रोम मार्ग के अतिरिक्त एक सायनाइड-प्रतिरोधी श्वसन मार्ग पाया जाता है, जिसे वैकल्पिक ऑक्सीडेज (Alternative Oxidase - AOX) उत्प्रेरित करता है।
  • यह मार्ग यूबिक्विनोन पूल (कॉम्प्लेक्स III के निकट) से सीधे इलेक्ट्रॉन ग्रहण कर ऑक्सीजन को जल में अपचयित करता है।
  • SHAM (सैलिसिलहाइड्रॉक्सेमिक एसिड) इस वैकल्पिक ऑक्सीडेज मार्ग का विशिष्ट संदमक (inhibitor) है।
  • अतः यह कॉम्प्लेक्स III से जुड़ी AOX शाखा को विशिष्ट रूप से रोकता है, इसलिए विकल्प 3 सही है।
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Agronomy विषय एवं अध्याय

विषय एवं पाठ्यक्रम के अनुसार सभी अध्याय देखें

सामान्य कृषि, पादप जैविकी, फसल सुरक्षा एवं सांख्यिकी

6 टॉपिक्स
Plant Physiology, Photosynthesis, Transpiration and Abiotic Stresses in Crops सक्रिय Historical Milestones, Agricultural Education, ICAR Institutes and Research Infrastructure Genetics, Cytogenetics, Plant Breeding Methods and Varietal Improvement Crop Protection: Major Diseases, Insect Pests and Integrated Plant Health Management Agricultural Statistics, Probability Distributions and Experimental Field Designs (CRD, RBD, SPD) Agricultural Extension, Rural Development Programs and Technology Transfer (KVK, ATMA)

सस्य विज्ञान के सिद्धांत, फसल पारिस्थितिकी, कृषि भूगोल एवं कृषि मौसम विज्ञान

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प्रमुख क्षेत्रीय फसलों का सस्य विज्ञान

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Agronomy of Cereal Crops I - Rice: Ecology, Nursery, SRI, Direct Seeded Rice (DSR), Water & Nutrient Management Agronomy of Coarse Cereals and Millets: Maize, Sorghum, Pearl Millet, Finger Millet and Small Millets Agronomy of Major Pulse Crops: Chickpea, Pigeonpea, Mungbean, Urdbean, Lentil and Field Pea Agronomy of Cereal Crops II - Wheat and Barley: Sowing Depth, CRI Stage, Tillage, Nutrient & Irrigation Agronomy of Commercial & Fiber Crops: Cotton, Jute, Sunnhemp and Mesta Agronomy of Plantation, Spice, Medicinal and Aromatic Crops: Tea, Coffee, Turmeric, Ginger and Mentha Agronomy of Fodder, Forage and Pasture Grasses: Berseem, Lucerne, Oat, Sorghum, Napier and Guinea Grass Agronomy of Major Oilseed Crops II: Soybean, Sunflower, Safflower, Linseed, Niger and Castor Agronomy of Sugar Crops: Sugarcane, Sugarbeet, Planting Systems (Trench, IISR, STP) and Ratoon Management

खरपतवार प्रबंधन एवं नियंत्रण

9 टॉपिक्स
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मृदा उर्वरता, पोषक तत्व एवं उर्वरक उपयोग

7 टॉपिक्स
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शुष्क भूमि सस्य विज्ञान एवं जलसंभर प्रबंधन

3 टॉपिक्स
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समस्याग्रस्त मृदाएं, सुधार एवं फसल उत्पादन

2 टॉपिक्स
Salt-Affected Soils: Saline, Sodic, Saline-Sodic Soils, Diagnostics (ECe, ESP, SAR, pH) and Chemical Reclamation Acid, Acid-Sulfate, Calcareous and Degraded Problem Soils: Liming, Amelioration and Crop Adaptation

टिकाऊ भूमि उपयोग प्रणालियां एवं संरक्षण कृषि

3 टॉपिक्स
Agroforestry Systems, Farming Systems Research (FSR), Integrated Farming Systems (IFS) and Wasteland Management Conservation Agriculture: Principles, Minimum Tillage, Zero Tillage, Bed Planting and Crop Residue Retention Organic Farming, Natural Farming (ZBNF), Certification Standards and Organic Inputs Preparation
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