Category: Daily Practice MCQs
Agriculture Daily Practice MCQs – 82
By Agritests |
27 Jul, 2026
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1. Which enzyme catalyzes the conversion of glutamate and ammonia into glutamine during primary nitrogen assimilation in plants? A. Glutamate synthase (GOGAT) B. Glutamine synthetase (GS) C. Aspartate aminotransferase D. Nitrate reductase Show Answer Answer: B. Glutamine synthetase (GS) Explanation: Glutamine synthetase catalyzes ATP-dependent incorporation of NH₄⁺ into glutamate to form glutamine, the first step […]
Agriculture Daily Practice MCQs – 81
By Agritests |
27 Jul, 2026
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1. Which enzyme catalyzes the conversion of sucrose into UDP-glucose and fructose during sucrose metabolism in higher plants? A. Invertase B. Sucrose synthase C. Hexokinase D. Phosphoglucomutase Show Answer Answer: B. Sucrose synthase Explanation: Sucrose synthase catalyzes the reversible conversion of sucrose and UDP into UDP-glucose and fructose, especially in sink tissues. 2. Which soil […]
Agriculture Daily Practice MCQs – 80
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27 Jul, 2026
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1. Which enzyme catalyzes the conversion of pyruvate to phosphoenolpyruvate during gluconeogenesis in germinating oilseeds? A. Pyruvate kinase B. Phosphoenolpyruvate carboxylase C. Phosphoenolpyruvate carboxykinase (PEPCK) D. Enolase Show Answer Answer: C. Phosphoenolpyruvate carboxykinase (PEPCK) Explanation: PEPCK catalyzes the formation of phosphoenolpyruvate during gluconeogenesis, enabling conversion of stored lipids into sugars in germinating seeds. 2. Which […]
Agriculture Daily Practice MCQs – 80
By Agritests |
27 Jul, 2026
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1. Which gene in wheat is primarily responsible for reducing plant height and played a crucial role during the Green Revolution? A. Lr34 B. Rht-B1 C. Pm21 D. Sr31 Show Answer Answer: B. Rht-B1 Explanation: The Rht-B1 dwarfing gene reduces stem elongation, improves lodging resistance, and significantly increases wheat yield potential. 2. Which soil process […]
Agriculture Daily Practice MCQs – 79
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27 Jul, 2026
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1. Which enzyme catalyzes the first committed step in the shikimate pathway leading to the biosynthesis of aromatic amino acids in plants? A. EPSP synthase B. DAHP synthase C. Chorismate mutase D. Phenylalanine ammonia-lyase Show Answer Answer: B. DAHP synthase Explanation: DAHP synthase catalyzes the condensation of phosphoenolpyruvate and erythrose-4-phosphate, initiating the shikimate pathway. 2. […]
Agriculture Daily Practice MCQs – 78
By Agritests |
27 Jul, 2026
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1. Which phytochrome form is considered physiologically active and initiates most light-mediated responses in plants? A. Pr B. Pfr C. Protochlorophyll D. Phycobilin Show Answer Answer: B. Pfr Explanation: Pfr is the biologically active form of phytochrome that regulates seed germination, flowering, and photomorphogenesis. 2. Which soil colloid possesses the highest cation exchange capacity per […]
Agriculture Daily Practice MCQs – 77
By Agritests |
27 Jul, 2026
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1. Which enzyme catalyzes the conversion of glutamate and ammonia into glutamine during primary nitrogen assimilation in plants? A. Glutamate synthase (GOGAT) B. Glutamine synthetase (GS) C. Aspartate aminotransferase D. Nitrate reductase Show Answer Answer: B. Glutamine synthetase (GS) Explanation: Glutamine synthetase catalyzes ATP-dependent incorporation of NH₄⁺ into glutamate to form glutamine, the first step […]
Agriculture Daily Practice MCQs – 76
By Agritests |
27 Jul, 2026
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1. Which of the following enzymes is responsible for the reduction of nitrate (NO₃⁻) to nitrite (NO₂⁻) in higher plants? A. Nitrite reductase B. Nitrate reductase C. Nitrogenase D. Glutamine synthetase Show Answer Answer: B. Nitrate reductase Explanation: Nitrate reductase catalyzes the cytosolic reduction of nitrate to nitrite using NADH or NADPH as the electron […]
Agriculture Daily Practice MCQs – 75
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27 Jul, 2026
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1. Which enzyme catalyzes the first committed step of the shikimate pathway leading to the biosynthesis of aromatic amino acids in plants? A. Chorismate mutase B. 3-Deoxy-D-arabino-heptulosonate-7-phosphate (DAHP) synthase C. EPSP synthase D. Phenylalanine ammonia-lyase Show Answer Answer: B. 3-Deoxy-D-arabino-heptulosonate-7-phosphate (DAHP) synthase Explanation: DAHP synthase catalyzes the condensation of phosphoenolpyruvate and erythrose-4-phosphate, the first committed […]
Agriculture Daily Practice MCQs – 74
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27 Jul, 2026
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1. In a diallel mating design involving n parents (excluding reciprocals), the total number of F₁ hybrids produced is: A. n(n−1) B. n(n+1)/2 C. n(n−1)/2 D. (n−1)/2 Show Answer Answer: C. n(n−1)/2 Explanation: In a half-diallel (excluding reciprocals and selfs), the number of F₁ crosses is n(n−1)/2. 2. Which of the following microorganisms is primarily […]