InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Nitrogenase enzyme isA. sensitive to moleculer oxygenB. only present in prokaryotesC. present within the bacteroidsD. all of the above |
| Answer» Correct Answer - D | |
| 2. |
Activity of nitrogenase enzyme depends onA. non-availability of ATPB. availability of nitric acidC. availability of ATPD. non-availability of nitric acid |
| Answer» Correct Answer - C | |
| 3. |
A plant requires nitrogen and sulphur for itsA. cell wallsB. storage vacuolesC. enzymesD. energy stores |
| Answer» Correct Answer - 3 | |
| 4. |
Name the mineral element that is component of ATP molecules. |
| Answer» Correct Answer - Phosphors | |
| 5. |
How many ATP are required for the formation of one molecule of `NH_3 ` by the nitrogenase enzyme ?A. SixB. EightC. TwelvD. Sixteen |
| Answer» Correct Answer - B | |
| 6. |
The major role of phosphorus in plant metabolism isA. O_(2) evolution during photosynthesisB. CO_(2) evolution during respirationC. create anaerobic conditionsD. generate metabolic energy |
| Answer» Correct Answer - D | |
| 7. |
The given equation refers to ` N_ 2 + 8 e ^(-) + 16 ATP to 2NH_ 3 + H_ 2 + 16ADP + 16P_i`A. AmmonificationB. NitrificationC. DenitificationD. Nitrogen fixation |
| Answer» Correct Answer - D | |
| 8. |
Presence of phosphorus in a plantA. Brings about healthy root growthB. Retards fruit ripeningC. Retards protein formationD. None of the above |
| Answer» Phosphorus promotes healthy root growth and fruit ripening by helping translocation of carbohydrates. | |
| 9. |
On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves apeared first inA. old leavesB. young leavesC. young leaves folowed by mature leaveD. mature leaves followed by young leaves |
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Answer» Correct Answer - A Chlorosis is an appearance of yellow colour due to non-synthesis or destruction of chlorophyll. It causes due to deficiency of Mg, N, Fe, Ca,S. if chlorosis occurs due to the deficiency of nitrogen then first older leaves become yellow. |
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| 10. |
On the basis of symtoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if yellowing of leaves appeared first inA. Young leavesB. Old leavesC. Young leaves followed by old leavesD. Old leaver followed by young leaves |
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Answer» Correct Answer - b |
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| 11. |
Match columns I and II correctly. `{:(,"Mineral",,"Deficiency symptoms"),((a),Cu,(i),"Malformed leaves"),((b),Zn, (ii),"Grey spots leaves"),((c),Mn,(iii),"Splitting bark"),((d),B,(iv),"Absence of root nodules"):}`A. `(a) to (iii) , (b) to (i), (c ) to (iv), (d) to (ii)`B. `(a) to (iii) , (b) to (i), (c ) to (ii), (d) to (iv)`C. `(a) to (iii) , (b) to (ii), (c ) to (iv), (d) to (i)`D. `(a) to (i) , (b) to (ii), (c ) to (iii), (d) to (iv)` |
| Answer» Correct Answer - B | |
| 12. |
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves. (a) Does it indicate that the element is actively mobilised or relatively immobile ? (b) Name two elements which are highly mobile and two which are relatively immobile. (c) How is the aspect of mobility of elements important to horticulture and angriculture ? |
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Answer» (a) The plants try to supply more nutrients to its younger leaves than the older leaves. When nutrients are mobile, the deficiency symptoms are shown by the older leaves first because that particular nutrient reaches the top first and lower leaves does not get that nutrient. Highly mobile elements are P, K and Mn. Less mobile elements are `Ca^(+)` and `K^(+)`. (c) The aspect of mobility of essential elements is important in horticulture and agriculture in the following ways (i) A crop in which older leaves are harvested if show deficiency symptoms , will decrease its economic value. (ii) The crops in which flowers, fruits and inflorescence are harvested, the immobile nutrients will not reach to the apex/tip because of immobility , so this will reduce the yield. |
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| 13. |
A plant requires phosphorus forA. cell wallsB. cell membranesC. enzymesD. starch deposits |
| Answer» Correct Answer - 2 | |
| 14. |
Elements required for ATP formationA. N, CuB. K, PC. N, PD. P, Ca |
| Answer» Correct Answer - 3 | |
| 15. |
On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves apeared first inA. old leavesB. young leavesC. mature leaves followed by young leavesD. young leaves followed by mature leaves |
| Answer» Correct Answer - 1 | |
| 16. |
A plant is showing symptoms like chlorosis of younger or older leaves, production of sterile flowers and grey spots. It may be due to the deficiency ofA. BB. KC. MnD. Ca |
| Answer» Correct Answer - 3 | |
| 17. |
Chlorosis is caused due to the deficiency ofA. MgB. CaC. BD. Mn |
| Answer» Correct Answer - A | |
| 18. |
Assertion: Deficiency of sulphur causes chlorosis in plants. Reason: Sulphur is a constituent of chlorophyll.A. Both Assertion and Reason are true and Reason is the correct explanation of assertionB. Both assertion and Reason are true, but reason is not the correct explanation of assertionC. Assertion is true, but reason is falseD. Assertion is false, but reason is true |
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Answer» Correct Answer - C Due to deficiency of sulphur, plant shows chlorosis (i.e., yellowing due to degradation of chlorophyll) followed by anthozyanin development. The younger leaves show chlorosis before older ones. Sulphur is not the consituent of chlorophyll. The main constituent of chlorophyll is magnesium. |
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| 19. |
While in N, K and Mg deficiency, chlorosis appears first in ____leaves, in S and Ca deficiency,_____lveaves are the first to be affectedA. young, oldB. old, youngC. old, oldD. young, young |
| Answer» Correct Answer - B | |
| 20. |
The yellowing of leaves called chlorosis, is caused by insufficientA. sodiumB. phosphorusC. copperD. magnesium |
| Answer» Correct Answer - D | |
| 21. |
Chlorosis in plants occurs due toA. high sunlight intensityB. carotenoid degenerationC. absorption of yellow pigments form the soilD. deficiency of Mg and Fe in the soil |
| Answer» Correct Answer - 4 | |
| 22. |
Mg and Fe are needed for plants in theA. energy transferB. synthesis of chlorophyll pigment in the leavesC. stomatal openingD. translocation of carbohydrates . |
| Answer» Correct Answer - 2 | |
| 23. |
The possibility of increase of infection become more due to more supply ofA. PotassiumB. MagnesiumC. CopperD. Nitrogen |
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Answer» Correct Answer - d Nitrogen excess in soil cause susceptibility towards pathogen like fungi, bacteria |
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| 24. |
What are the steps involved in formation of a root nodule? |
| Answer» Multiple interactions are involved in the formation of root nodules. The Rhizobium bacteria divide and form colonies. These get attached to the root hairs and epidermal cells. The root hairs get curled and are invaded by the bacteria. This invasion is followed by the formation of an infection thread that carries the bacteria into the cortex of the root. The bacteria get modified into rod-shaped bacteroides. As a result, the cells in the cortex and pericycle undergo division, leading to the formation of root nodules. The nodules finally get connected with the vascular tissues of the roots for nutrient exchange. | |
| 25. |
In nitrogen cycle, PseudomonasA. Fies nitrogenB. Produces elemental nitrogenC. Oxidises ammonium nitrogen to nitrateD. Transfer of elemental nitrogen |
| Answer» Correct Answer - B | |
| 26. |
Under anaerobic conditions, denitrifying bacteria such as Pseudomonas could convertA. nitrates to nitritesB. nitrates to molecular nitrogenC. nitrite to nitratesD. nitrates to ammonia |
| Answer» Correct Answer - B | |
| 27. |
‘All elements that are present in a plant need not be essential to its survival’. Comment. |
| Answer» Plants tend to absorb different kinds of nutrients from soil. However, a nutrient is inessential for a plant if it is not involved in the plant’s physiology and metabolism. For example, plants growing near radioactive sites tend to accumulate radioactive metals. Similarly, gold and selenium get accumulated in plants growing near mining sites. However, this does not mean that radioactive metals, gold, or selenium are essential nutrients for the survival of these plants. | |
| 28. |
Which of the following is not a physiological role of potassium ?A. Maintain anion - cation balance in cellsB. Maintain turgidity of cellsC. Help in opening and closing of stromataD. Synthesize auxins |
| Answer» Correct Answer - D | |
| 29. |
Give one physiological role of nickel. |
| Answer» It is involved in the metabolism of urea. | |
| 30. |
State one physiological function of zinc. |
| Answer» Zinc is required in the synthesis of auxin. | |
| 31. |
Give one physiological role of phosphorus. |
| Answer» Phosphorus is a contituent of cell membranes, certain proteins, nucleotides, nucleic acids, ATP, NADP and nucleoproteins. | |
| 32. |
Is iron essential for the formation of chlorophyll pigment ? |
| Answer» Correct Answer - Yes | |
| 33. |
Which one of the following symptoms is not due to manganese toxicity in plants?A. calcium translocation in shoot apex is inhibitedB. deficiency in both iron and nitrogen in inducedC. appearance of brown spot surrounded by chlorotic veinsD. none of the above |
| Answer» Correct Answer - B | |
| 34. |
Where is manganese required in the body of plants ? |
| Answer» Leaves and seeds. | |
| 35. |
Plants can be grown in (Tick the incorrect option)A. soil with essential nutrients.B. water with essential nutrients.C. either water or soil with essential nutrients.D. water or soil without essential nutrients. |
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Answer» Correct Answer - C The plants can be grown in any medium either water of soil if it is supported with all essential elements. Medium does not affect the plant growth but availability of all elements does affect the growth but availability of all elements does affect the growth do the plants. |
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| 36. |
Best defined function of manganese in green plants isA. Calvin cycleB. Nitrogen fixationC. Water absorptionD. Photolysis of water |
| Answer» Correct Answer - D | |
| 37. |
Which one of the following is correctly matched?A. Apoplast-PlasmodesmataB. Potassium-Readily immobilizationC. Bakane of rice seedlings-F. SkoogD. Passive transport of nutrients-ATP |
| Answer» Correct Answer - C | |
| 38. |
Find the odd one (w.t.r critical element).A. NitrogenB. PotassiumC. NickelD. Phosphorus |
| Answer» Correct Answer - C | |
| 39. |
Plants can be grown in (Tick the incorrect option)A. soil with essential nutrientsB. water with essential nutrientsC. either water or soil with essential nutrientsD. water or soil without essential nutrients |
| Answer» Correct Answer - C | |
| 40. |
In the initial phase of mineral ion absorption, there is a rapid uptake of ions into _____space of cells. Ions aborbed in this phase are ______exchangeable. It is _____uptake as it _____the expenditure of metabolic energy.A. inner, not freely, active, requiresB. inner, freely, passive, requiresC. outer, freely, passive, does not requireD. outer, not freely, active, requires |
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Answer» Correct Answer - C There are two phases during process of mineral ion absorption---initial phase and metabolic phase. In the initial phase, there is a rapid uptake of ions into outer or free space (intercellular spaces and cell walls) of cells. Ions absorbed in free space are freely exchangeable. Entry of ions into outer space is passive absorption as no energy is required for it. |
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| 41. |
Which is not a trace element ?A. MnB. CuC. MoD. K |
| Answer» Correct Answer - D | |
| 42. |
During ionic flux, uptake of ions into inner space isA. ActiveB. PassiveC. Energy dependentD. Both (1) and (3) |
| Answer» Correct Answer - D | |
| 43. |
A trace element is/areA. required is very minute amounts by plantB. a radioactive and can be traced by geiger counterC. an element which draws other element out of protoplasmD. all of the above |
| Answer» Correct Answer - A | |
| 44. |
Hydroponics I. is useful in areas having infertile and dry soils II. Can regulate pH optimum for a particular crop. III. Increases labour cost. IV. Increases problem of weeding.A. II and IVB. I and IIC. I and IIID. All of the above |
| Answer» Correct Answer - B | |
| 45. |
Which one of the following is not a micronutrientA. BoronB. MolybdenumC. MagnesiumD. Zinc |
| Answer» Correct Answer - C | |
| 46. |
Carbon becomes available to crop plants in the form ofA. amino acidsB. carbonatesC. carbon dioxideD. element carbon |
| Answer» Correct Answer - 3 | |
| 47. |
A micronutrient is one whichA. is less important than the major essential elementB. is present in large quantities in the soilC. is more important than the major essential elementD. is needed in very small amount but it is as important as a major essential element |
| Answer» Correct Answer - D | |
| 48. |
Which one of the following is a micronutrient in plants?A. MagnesiumB. ZincC. potassiumD. Calcium |
| Answer» Correct Answer - B | |
| 49. |
Which one of the following is a micronutrient ?A. ManganeseB. NitrogenC. MagnesiumD. Calcium |
| Answer» Correct Answer - A | |
| 50. |
Which one of the following elements is not required by plants for their healthy normal growth?A. CalciumB. MagnesiumC. LeadD. Iron |
| Answer» Correct Answer - 3 | |