Plant Pathology - Study Mode

[#461] Plants use zinc as
Correct Answer

(A) Zn 2+

Explanation

Solution: Plants use zinc as Zn 2+ . The Zn 2+ cation is the predominate form taken up by plants. Function: Zinc is a component of many organic complexes and DNA proteins. It is also an important enzyme for protein synthesis. It is used in the formation of chlorophyll and some carbohydrates and is used in the conversion of starches to sugars. Zinc is essential in the formation of auxins, which help with growth regulation and stem elongation.

[#462] Plant nutrient critical for nitrogen fixation in legumes is
Correct Answer

(D) Mo

Explanation

Solution: The plant nutrient critical for nitrogen fixation in legumes is Mo. Molybdenum (Mo), an essential micronutrient, plays an important role in nitrogen (N) metabolism and protein synthesis in plants. During symbiotic N fixation, Mo acts as a cofactor for nitrogenase enzymes to catalyze the redox reaction to convert elemental N into ammonium (NH 4 + ) ions. Supply of molybdenum and Fe to bacteroids is therefore an important process and most likely a key regulatory component in the maintenance of nitrogen fixation in legumes.

[#463] Insecticides are specific inhibitors of
Correct Answer

(A) Nervous system

Explanation

Solution: Insecticides are specific inhibitors of the Nervous system. Many insecticides act upon the insect's nervous system, while others act as growth regulators or endotoxins. Most act on neurons by causing a sodium/potassium imbalance preventing normal transmission of nerve impulses.

[#464] Ammonia anhydrous contains
Correct Answer

(A) 82% nitrogen

Explanation

Solution: Ammonia anhydrous contains 82% nitrogen. Ammonia anhydrous, which contains 82 percent nitrogen, is the most concentrated nitrogen fertilizer. Anhydrous ammonia is a liquid when kept under pressure, but turns into a gas when not contained.

[#465] Who is the father of Mycology
Correct Answer

(B) A. P. Michelli

Explanation

Solution: A. P. Michelli is the father of Mycology. He discovered the spores of mushrooms, was a leading authority on cryptogams, and coined several important genera of microfungi including Aspergillus and Botrytis. In this work, he gave descriptions of 1900 plants, of which about 1400 were described for the first time. Among these were 900 fungi and lichens, accompanied by 73 plates.