Plant Physiology MCQs-19

Plant Physiology MCQs-19
Multiple Choice Questions (MCQs)
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1. In seed testing and quality assurance, the Electrical Conductivity (EC) test is a quick, non-destructive method primarily used to estimate ________________

 The dry weight and overall physical dimensions of the seed lot

 The viability of seeds based on the integrity of cellular membranes

 The percentage of hard seeds exhibiting physical dormancy

 The optimal stratification temperature for breaking dormancy

2. Photorespiration causes a metabolic loss of ___________

 Nitrogen

 Oxygen

 Water

 Carbon and energy

3. The glyoxylate cycle plays a crucial role in germinating oil-rich seeds because it ____________

 Produces nitrogen

 Produces oxygen

 Reduces transpiration

 Converts stored lipids into carbohydrates

4. The study of the seasonal timing of recurring biological events in plants, such as flowering, leaf emergence, and fruiting, is known as _________

 Phenology

 Thermogenesis

 Geotropism

 Photolysis

5. The link reaction (pyruvate oxidation) connecting glycolysis to the Krebs cycle occurs in the __________

 Ribosome

 Mitochondrial matrix

 Cytoplasm

 Chloroplast stroma

6. Boundary layer resistance affects _________

 Photosynthesis only

 Respiration rate

 Nitrogen fixation

 Rate of transpiration

7. During cellular respiration, the Krebs cycle primarily generates the largest amount of __________

 Reduced coenzymes (NADH, FADH₂)

 Oxygen molecules

 Carbon dioxide molecules

 ATP molecules directly

8. Cyanide poisoning inhibits cellular respiration by blocking ___________

 Cytochrome oxidase

 Krebs cycle

 ATP synthase

 Glycolysis

9. Plants adapted to high light intensity are called ____________

 Heliophytes

 Halophytes

 Hydrophytes

 Sciophytes

10. Most of the water absorbed by plant roots is primarily used for _________

 Protein synthesis

 Chlorophyll formation

 Transpiration and cooling of leaves

 Photosynthesis

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Plant Physiology MCQs-19

Plant Physiology MCQs

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Multiple Choice Questions (MCQs) for Professional Test Preparation

Use of Multiple-choice questions (MCQs) is among the proven strategies to test your knowledge and improve your skills for relevant exams. These Expert-Approved MCQs cover various aspects of the fundamentals of agriculture, crop plants, production technologies, dietary and nutritional importance and industrial processes. Moreover, key questions about soil, irrigation, pests, diseases and other aspects of crop management are also included. Return to [MCQ Homepage]

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Plant Physiology MCQs

Plant physiology is the branch of botany focused on how plants function at cellular, biochemical, and organismal levels. It investigates crucial processes—photosynthesis, nutrient uptake, respiration, hormone action, and water transport—essential for plant growth, development, and environmental adaptation.

Key areas within the study of plant physiology include

1. Photosynthesis
2. Respiration
3. Transpiration
4. Water and mineral uptake
5. Transport (xylem and phloem)
6. Growth and development
7. Hormonal regulation
8. Nutrient assimilation
9. Stress physiology
10. Reproductive physiology

Photosynthesis: Plants capture light energy to convert carbon dioxide and water into glucose for energy,.
Water and Nutrient Transport: The xylem moves water upward from roots, while phloem transports nutrients throughout the plant.
Growth and Development: Study of how phytohormones regulate growth, seed germination, and response to environmental stressors like heat or drought.
Environmental Physiology: Understanding how plants adapt to their environment, such as managing water loss through stomatal closing

Plant Physiology MCQs, Photosynthesis MCQs, Nutrient Uptake MCQs, Transpiration and Respiration MCQs, Plant Growth Regulators