Locomotion And Movement

Q1. Zinc as a nutrient is used by the plants in the form of:

1. Zn
2. Zn²⁺
3. ZnO
4. ZnSO₄

Q2. Plants die from prolonged water-logging because.

1. Cell sap in the plants becomes too dilute.
2. Root respiration stops.
3. Nutrients leach down due to excess water.
4. Soil nutrients become very dilute.

Q3. Which of the following is a group of micronutrients?

1. Ca, Zn, B
2. Fe, Mn, Cu
3. Cl, C, Ca
4. Ni, Mo, H

Q4. Death of stem and root tips occur due to deficiency of:

1. Calcium.
2. Nitrogen.
3. Carbon.
4. Phosphorus

Q5. Which one of the following elements in plants is not remobilised?

1. Calcium.
2. Sulphur.
3. Phosphorus.
4. Potassium.

Q6. Manganese is required in.

1. Photolysis of water during photosynthesis.
2. Chlorophyll synthesis.
3. Nucleic acid synthesis.
4. Plant cell wall formation.

Q7. Non-symbiotic (free-living) aerobic, nitrogen fixing bacterium, is:

1. Frankia.
2. Azotobacter.
3. Clostridium.
4. Rhizobium.

Q8. Which one of the following statements can best explain the term critical concentration of an essential element?

1. Essential element concentration below which plant growth is retarded.
2. Essential element concentration below which plant growth becomes enhanced.
3. Essential element concentration below which plant remains in the vegetative phase.
4. None of the above.

Q9. Which of the following is a symbiotic nitrogen fixer?

1. Frankia.
2. Azolla.
3. Glomus.
4. Azotobacter.

Q10. A trace element essential for plant growth and radio-isotope, which is used in cancer therapy is:

1. Sodium.
2. Iron.
3. Calcium.
4. Cobalt.

Q11. Which element is located at the centre of the porphyrin ring in chlorophyll?

1. Calcium.
2. Potassium.
3. Manganese.
4. Magnesium.

Q12. The formation of first stable product of nitrogen fixation is catalysed by enzyme.

1. Dehydrogenase.
2. Nitrogenase.
3. Isomerase.
4. None of these.

Q13. Which one of the following elements is not an essential micronutrient for plant growth?

1. Mn
2. Zn
3. Cu
4. Ca

Q14. What is the role of calcium in plants?

1. Formation of cell wall.
2. Formation of dead tissues.
3. Formation of xylem fibres.
4. Formation of phloem fibres.

Q15. Presence of phosphorus.

1. Brings about healthy root growth.
2. Promotes fruit ripening.
3. Retards protein formation.
4. None.

Q16. Exanthema is due to deficiency of:

1. B
2. Mo
3. Mn
4. Cu

Q17. An element playing important role in nitrogen fixation is:

1. Molybdenum.
2. Copper.
3. Manganese.
4. Zinc.

Q18. Which of the following is not performed by root hairs?

1. Oxygen uptake.
2. CO uptake.
3. Water uptake.
4. Mineral uptake.

Q19. Nitrogen-fixation in root nodules of Alnus is brought about by.

1. Bradyrhizobium.
2. Clostridium.
3. Frankia.
4. Azorhizobium.

Q20. Which one of the following is a micronutrient for plants?

1. Calcium.
2. Magnesium.
3. Manganese.
4. Nitrogen.

Q21. Which of the following cannot be an essential element?

1. Element absolutely necessary for plant’s survival.
2. Element which can be replaced with another element.
3. Element which is directly involved in metabolism.
4. Element which is directly involved in anabolism.

Q22. Toxicity of which element leads to the appearance of brown spots on leaves.

1. Mg
2. Mn
3. Fe
4. Cu

Q23. Which of the following is not a macronutrient.

1. Iron.
2. Calcium.
3. Manganese.
4. Phosphorus.

Q24. Soil can easily become deficient in_________ because these ions are negatively charged and do not stick to
negatively charged clay particles.

1. Nitrate.
2. Ammonium.
3. Both.
4. None of these.

Q25. The function of leghaemoglobin during biological nitrogen fixation in the root nodules of legumes, is:

1. Convert atmospheric nitorgen into ammonia.
2. Convert ammonia into nitrite.
3. Transport oxygen to all cells.
4. Protect the enzyme nitrogenase from oxygen.

Q26. Grey spots of oat are caused by deficiency of:

1. Fe
2. Cu
3. Zn
4. Mn

Q27. Which among the following is present in the root nodules of leguminous plants?

1. Azolla.
2. Rhizobium.
3. Nostoc.
4. Azotobacter.

.

Q28. The core metal of chlorophyll is:

1. Iron.
2. Magnesium.
3. Nickel.
4. Copper.

Q29. Mineral associated with cytochrome is:

1. Cu
2. Mg
3. Fe and Mg
4. Fe and Cu

Q30. The core element of chlorophyll is:

1. Manganese.
2. Ironne.
3. Magnesium.
4. Zinc.