Plant Pathology - Study Mode
[#286] The biological method for determining deficiency of lime, P and K is
Correct Answer
(C) Azotobacter Plague Test
Explanation
Solution: The biological method for determining the deficiency of lime, P and K is Azotobacter Plague Test. The sensitivity of the Azotobacter group of organisms to soil acidity and lack of available phosphate has been long recognized and has been the basis of microbiological tests to check soil deficiencies.
[#287] Who is the father of plant pathology in India
Correct Answer
(A) E. J. Butler
Explanation
Solution: E. J. Butler is the father of plant pathology in India. Sir Edwin John Butler was an Irish mycologist and plant pathologist. He became the Imperial Mycologist in India and later the first director of the Imperial Bureau of Mycology in England. During his twenty years in India, he began large-scale surveys on fungi and plant pathology and published the landmark book Fungi and Disease in Plants: An Introduction to the Diseases of Field and Plantation Crops, and has been called the Father of Mycology and Plant Pathology in India.
[#288] Consider the following processes on host plant occurring during pathogenesis 1. Landing of inoculum 2. Penetration 3. Germination 4. Recognition 5. Establishment and sporulation The correct sequence of these processes is
Correct Answer
(C) 1, 3, 2, 4, 5
Explanation
Solution: The following processes on the host plant occur during pathogenesis. The correct sequence of these processes is 1. Landing of inoculum 2. Germination 3. Penetration 4. Recognition 5. Establishment and sporulation Pathogenesis is the process by which a disease or disorder develops. It can include factors that contribute not only to the onset of the disease or disorder but also to its progression and maintenance.
[#289] Which can function as carrier in active absorption?
Correct Answer
(B) Lecithin
Explanation
Solution: Lecithin can function as a carrier in active absorption. Lecithin is a generic term to designate any group of yellow-brownish fatty substances occurring in animal and plant tissues that are amphiphilic, they attract both water and fatty substances and are used for smoothing food textures, emulsifying, homogenizing liquid mixtures, and repelling sticking materials. It acts as a wetting agent, stabilizing agent, and choline enrichment carrier helps in emulsification and encapsulation and is a good dispersing agent.
[#290] Nematicides inhibits which enzyme of nervous system in killing of nematodes
Correct Answer
(D) Acetyl cholinesterase
Explanation
Solution: Nematicides inhibit the Acetyl cholinesterase enzyme of the nervous system in the killing of nematodes. Nematicides from both the organophosphate and carbamate groups affect the central nervous system of nematodes by inhibiting acetylcholinesterase activity. This results in the build up of acetylcholine, which is a neurotransmitter in synapses and neuromuscular junctions, and causes nematode paralysis and death.