PPathox

1. Who discovered that the root disease fungus Phymatotrichum omnivorum could not grow in the soil although it infected the finest rootlets? A. Tabenhaus and Ezekiel B. Waksman C. Reinking and Manns D. Garrett 2. Who emphasized the important role that fungi play in the economy of the soil? A. Tabenhaus and Ezekiel B. Waksman C. Reinking and Manns D. Garrett 3. Who observed two types of soil fungi, soil inhabitants and the soil invaders? A. Tabenhaus and Ezekiel B. Waksman C. Reinking and Manns D. Garrett 4. Who renamed the soil invaders as root inhabiting fungi and distinguished the two groups by their "competitive saprophytic ability"? A. Tabenhaus and Ezekiel B. Waksman C. Reinking and Manns D. Garrett 5. Who consolidated the concept of inoculum potential? A. Tabenhaus and Ezekiel B. Waksman C. Reinking and Manns D. Garrett Answers: 1. A 2. B 3. C 4. D 5. D

1. Who is known as ‘The father of botany’? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus 2. Who invented the microscope in the 17th century? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus 3. Who discovered bacteria in 1617? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus 4. Who made an extensive study of fungi and their reproductive structures in 1729? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus 5. Who gave the first experimental proof that fungi were autonomous organisms which produced seed-like bodies? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus 6. Who gave the binomial system of nomenclature? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus 7. Who applied the binomial system of nomenclature to fungi and gave firm footing to the taxonomy of fungi? A. Antonie van Leeuwenhoek B. Micheli C. Theophrastus D. Linnaeus's students Persoon and Fries 8. Who experimentally p

1. Which type of plant pathogenic bacteria is rod-shaped and lacks flagella? A) Atrichous B) Peritrichous C) Agrobacterium D) Rickettsia Like Organisms 2. What is the name of the rod-shaped plant pathogenic bacteria with flagella present on the whole periphery/surface? A) Atrichous B) Peritrichous C) Erwinia spp. D) Agrobacterium 3. Which type of bacteria is sensitive to antibiotics such as tetracycline and penicillin? A) Atrichous B) Peritrichous C) Rickettsia Like Organisms D) Agrobacterium 4. Which type of bacteria is sensitive to high temperature? A) Atrichous B) Peritrichous C) Rickettsia Like Organisms D) Agrobacterium 5. Which type of plant pathogenic bacteria is commonly associated with crown gall disease? A) Atrichous B) Peritrichous C) Erwinia spp. D) Agrobacterium Answers:  1. A) Atrichous  2. B) Peritrichous  3. C) Rickettsia Like Organisms  4. C) Rickettsia Like Organisms  5. D) Agrobacterium

1. Which of the following is NOT a common plant pathogen? a) Fusarium b) Rhizoctonia c) Pythium d) E. coli 2. What is the primary mode of transmission for plant viruses? a) Soil b) Water c) Insects d) Birds 3. Which of the following is NOT a symptom of bacterial wilt in plants? a) Wilting leaves b) Yellowing leaves c) Stunted growth d) Dark lesions on stems 4. Which of the following is NOT a method for controlling plant diseases? a) Crop rotation b) Chemical pesticides c) Biological control agents d) Overwatering 5. What is the primary function of plant pathology in agriculture? a) To increase crop yields b) To decrease crop yields c) To promote the growth of weeds d) To study the effects of climate change on plants Answers: 1. d) E. coli 2. c) Insects 3. b) Yellowing leaves 4. d) Overwatering 5. a) To increase crop yields

1. What is a virus? a) A submicroscopic entity that replicates only in living cells and consists of either DNA or RNA. b) A type of bacteria. c) A small animal. d) None of the above. 2. What is the term for a completely assembled infectious virus particle? a) Nucleic acid. b) Virus. c) Capsid. d) Virion. 3. What is the size range of plant viruses? a) 2-20nm. b) 20-2000nm. c) 2000-5000nm. d) None of the above. 4. What is the protein coat of a viral particle called? a) Nucleic acid. b) Capsid. c) Virion. d) Envelope. 5. Are viruses obligate intracellular parasites? a) Yes. b) No. c) Sometimes. d) None of the above. 6. What percentage of a virus is made up of nucleic acid? a) 5-40%. b) 60-95%. c) 100%. d) None of the above. 7. What is the nucleic acid content of elongated viruses as compare to spherical viruses? a) High. b) Low. c) It depends on the virus. d) None of the above. 8. What are viruses called when their genome is present in different particles? a) Unipartite viruses. b) Multi

1. The vegetative body of fungi is called as- a) Hypha b) Spore c) Mycelium d) Rhizomorph 2. Which type of hyphae in fungi have scattered nuclei in the cytoplasm? a) Aseptate hyphae b) Septate hyphae c) Coenocytic hyphae d) Branched hyphae 3. The thicker root-like aggregates in fungi is called as- a) Mycelium b) Hypha c) Rhizomorphs d) Sclerotia 4. The hard roundish or amorphous structure in fungi is known as- a) Mycelium b) Hypha c) Rhizomorphs d) Sclerotium 5. The mat-like structures in fungi that contain the fruiting bodies is called as? a) Mycelium b) Hypha c) Stroma d) Sporangium Answers: 1. c 2. c 3. c 4. d 5. c