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MCQ on Plant disease epidemiology 1. Epidemiology in plant pathology is primarily the study of: A. Pathogen reproduction B. Host immunity C. Disease outbreaks, intensity, causes, and effects D. Crop yields Answer: C 2. A disease that occurs consistently in a specific area over time is termed as: A. Epidemic B. Endemic C. Pandemic D….
MCQ on Defense Mechanism in Plants MCQs on Pre-Existing Structural Defenses 1. What is the main function of cutin and wax in the plant cuticle? A. Facilitate spore germination B. Prevent water retention on plant surfaces C. Increase pathogen colonization D. Enhance photosynthesis efficiency Answer: B. Prevent water retention on plant surfaces 2. Which of…
Pathogenesis – Role of Enzymes, Toxins, Growth Regulators, and Polysaccharides 1. What does the term “pathogenesis” primarily describe? A. The treatment of diseases B. The step-by-step development of a disease C. The prevention of diseases D. The immune response to diseases Answer: B 2. Which is NOT a chemical weapon used by pathogens? A. Enzymes…
MCQ on Phenomenon of infection – pre-penetration, penetration and post penetration Pre-Penetration What is the term for the initial contact between infective propagules of a parasite and a potential host plant? A. Colonization B. Inoculation C. Penetration D. Germination Answer: B Which of the following can act as a signal for the formation of an…
MCQ on Terms and concepts in plant pathology 1. What is plant pathology? A) Study of biotic and abiotic agents causing diseases in plants B) Study of plant growth C) Study of plant reproduction D) Study of plant nutrition Answer: A) Study of biotic and abiotic agents causing diseases in plants 2. Which disease caused…
1. What are viroids? A) Proteinaceous infectious agents B) Covalently closed circular RNA molecules C) Linear DNA molecules D) Non-infectious proteins Answer: B) Covalently closed circular RNA molecules 2. Which was the first viroid reported? A) Potato spindle tuber viroid B) Citrus exocortis viroid C) Hop stunt viroid D) Grapevein viroid Answer: A) Potato spindle…
1. What is the general nature of a virus? A) Multicellular parasite B) Submicroscopic, transmissible, intercellular, obligate parasite C) Cellular organism D) Non-parasitic microorganism Answer: B) Submicroscopic, transmissible, intercellular, obligate parasite 2. What is the typical size range of viruses? A) Greater than 200 millimicron B) Less than 200 millimicron C) 200-500 millimicron D) 1-2…