Table of Contents
#1. Which one of the following mineral elements plays an important role in biological nitrogen fixation ?
#2. In which of the following forms is iron absorbed by plants?
#3. Which of the following elements is responsible for maintaining turgor in cells?
#4. A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
#5. Which of the following bacteria reduce nitrate in soil into nitrogen?
#6. The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport:
#7. A thiobacillus is a group of bacteria helpful in carrying out
#8. Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
#9. Boron in green plants assists in
#10. Mycorrhiza is a symbiotic relationship between roots of higher plants and
#11. Which ofthe following is a free living aerobic nonphotosynthetic nitrogen-fixer?
#12. Passive absorption of minerals depend on
#13. Which aquatic fern performs nitrogen fixation?
#14. Which of the following can fix atmospheric nitrogen?
#15. Identify a micronutrient for plants amongst the following:
#16. In which of the following all three are macronutrients?
#17. A pair of insectivorous plants is
#18. Which ofthe following is not caused by deficiency of mineral nutrition?
#19. A plant requires magnesium for
#20. Deficiency symptoms of nitrogen and potassium are visible first in:
#21. The major role of minor elements inside living organisms is to act as
#22. Which one oft he following is not an essential element for plants ?
#23. Which one of the following is a micronutrient for plants?
#24. The major portion of the dry weight of plants comprises of
#25. Enzyme involved in nitrogen assimilation
#26. Which one gives the most valid and recent explanation for stomatal movements?
#27. Minerals known to be required in large amounts for plant growth include:
#28. Grey spots of oat are caused by deficiency of
#29. Which is essential for the growth of root tip?
#30. The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plant is / are.
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