Q.20
ICAR AIEEA PG Agronomy 09 July 2023 (Shift 1) Paper
MCQ (Single Correct)
English हिन्दी
The product of photorespiration process is :
प्रकाशीय श्वसन (Photorespiration) प्रक्रिया का उत्पाद कौन सा है?
EXPLANATION Plant Physiology, Photosynthesis, Transpiration and Abiotic Stresses in Crops
  • In the oxygenase reaction of Rubisco during photorespiration, Ribulose-1,5-bisphosphate ($RuBP$) reacts with molecular oxygen ($O_2$):
    $$\text{RuBP (5C)} + \text{O}_2 \xrightarrow{\text{Rubisco}} \text{3-Phosphoglycerate (3C)} + \text{2-Phosphoglycolate (2C)}$$
  • Therefore, the immediate cleavage products are one molecule of Phosphoglycerate (PGA) and one molecule of Phosphoglycolate.
  • Because both Phosphoglycerate (A) and Phosphoglycolate (B) are generated, Option 3 (Both A and B) is the correct answer.
  • प्रकाशीय श्वसन (C2 चक्र) में जब रुबिस्को एंजाइम ऑक्सीजन ($O_2$) से जुड़ता है, तो RuBP (5-कार्बन) का विखंडन होता है:
    $$\text{RuBP} + \text{O}_2 \rightarrow \text{3-फॉस्फोग्लिसरेट (3C)} + \text{2-फॉस्फोग्लाइकोलेट (2C)}$$
  • इस प्रकार इसके प्राथमिक उत्पाद 3-फॉस्फोग्लिसरेट (PGA) तथा 2-फॉस्फोग्लाइकोलेट दोनों हैं।
  • अतः सही उत्तर विकल्प 3 (Both A and B) 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
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प्रमुख क्षेत्रीय फसलों का सस्य विज्ञान

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खरपतवार प्रबंधन एवं नियंत्रण

9 टॉपिक्स
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मृदा उर्वरता, पोषक तत्व एवं उर्वरक उपयोग

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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
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टिकाऊ भूमि उपयोग प्रणालियां एवं संरक्षण कृषि

3 टॉपिक्स
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