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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.
| 451. |
Which group of three micronutrient elements is required for both photosynthesis and mitochondrial electron transport ?A. Cu, Mn, FeB. Co, Ni, MoC. Ca, K, NaD. Mn, Co, Ca |
| Answer» Correct Answer - 1 | |
| 452. |
Cuscuta is an example ofA. PredationB. EndoparasitismC. EctoparasitismD. Brood parasitism |
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Answer» Correct Answer - 3 Cuscuta (Amarbel) is a total stem ectoparasite. |
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| 453. |
Nitrosomonas bacteria convertsA. `NO_(3)` into `NH_(3)`B. `NH_(3)` into `NO_(2)`C. `NO_(2)` into `NO_(3)`D. `NO_(2)` into `NH_(3)` |
| Answer» Correct Answer - B | |
| 454. |
Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms?A. SulphurB. MagnesiumC. NitrogenD. Potassium |
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Answer» Correct Answer - A The parts of the plants that show deficiency symptoms depend on the mobility of the element in the plant. Deficiency symptoms appear first in young leaves and young tissues for elements which are relatively immobile inside the plant e.g., Ca and S are a part of the structural component of the cell and hence are not easily released. the symptoms appear first in old leaves and tissues for those elements which are mobilised from from senescing regions for supply to young tissues e.g., N, K, Mg. |
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| 455. |
Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental dificency would show such symptoms?A. sulphur and potassiumB. MagnesiumC. NitrogenD. Potassium |
| Answer» Correct Answer - A | |
| 456. |
Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms?A. CaB. MgC. ND. K |
| Answer» Correct Answer - A | |
| 457. |
Deficiency symptoms tend to appear first in_____whenever the essential elements are relatively immobile and are not transported out of the mature organs.A. younger tissuesB. older tissuesC. rootsD. shoots |
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Answer» Correct Answer - A The deficiency symptoms tend to appear first in the young tissues whenever the elements are relatively immobile and are not transported out of the mature organs, for example, elements like sulphur (S) and calcium (Ca) are a part of the structural components of the cell and hence are not easily released. |
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| 458. |
The function of leghaemoglobin in the root nodules of legumes is:-A. Inhibition of nitrogenase activityB. Oxygen removalC. Nodule differentiationD. Expression of nif gene |
| Answer» Correct Answer - 2 | |
| 459. |
Which one of the following elements (miconutrients) in plants is not remobilised ?A. PhosphorusB. CalciumC. PotassiumD. Sulphur |
| Answer» Correct Answer - 2 | |
| 460. |
Hydroponics is the method ofA. water conservationB. plant development in water without soilC. plant development without soilD. plant development in saline soil |
| Answer» Correct Answer - 2 | |
| 461. |
A free-living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is :A. TolypothrixB. ChlorellaC. NostocD. Anabaena |
| Answer» Correct Answer - D | |
| 462. |
Nepenthes, Dionaea, Drosera and Utricularia are |
| Answer» All the above mentioned plants are carnivorous (insectivorous) plants. These trap insects and digest them by proteolytic enzymes and thus, make up their nitrogen deficiency. | |
| 463. |
If nitrogen is bubbled in the rooting medium, active absorption of minerals willA. IncreaseB. DecreaseC. Remain sameD. Stop immediately |
| Answer» Correct Answer - B | |
| 464. |
Most vascular plants increase the absorption of minerals byA. mycorrhizaeB. convertible phloemC. casparian channels along the phloemD. companion cells |
| Answer» Correct Answer - 1 | |
| 465. |
The deficiency sympton of phosphorus isA. lodging of cerealsB. leaf curlC. stunted growthD. wrinkling of grains |
| Answer» Correct Answer - 3 | |
| 466. |
Bacteria which break down the dead organisms of the soil into nitrogen compounds are termedA. denitrifying bacteriaB. nitrifying and ammonifying bacteriaC. nitrogen fixing bacteriaD. parasitic bacteria. |
| Answer» Correct Answer - 2 | |
| 467. |
An element present in middle lamella isA. ZnB. CuC. CaD. S |
| Answer» Correct Answer - C | |
| 468. |
Select the incorrect match .A. Mn - Photolysis of waterB. Ca - Synthesis of middle lamellaC. P - Component of ATPD. Zn - Constituent of coenzyme A |
| Answer» Correct Answer - D | |
| 469. |
Select incorrect statement w.r.t micronutrients.A. Become toxic in excess.B. Involved in activation of enzymeC. Involved in building of protoplastic constituentsD. Concentration is less then 10 millimole ` kg ^(-1) ` of dry matter. |
| Answer» Correct Answer - C | |
| 470. |
Rice fields produce an important green house gas. Name it. |
| Answer» Rice fields remain logged with excess water. Which harbour the great microbial activity. Many anaerobic bacteria also grow in these areas and release methane which is a green house gas. | |
| 471. |
Select the incorrect matchA. Mn - Photolysis of waterB. Fe - Carbohydrate and water transiocationC. S - Constituent of coenzyme AD. Ca. - Synthesis of middle lamella |
| Answer» Correct Answer - B | |
| 472. |
Deficiency of which set of minerals first appear in older leaves ?A. N, K, MgB. N, Mg, CaC. S, B, MgD. Mg, Ca, Fe |
| Answer» Correct Answer - A | |
| 473. |
Deficiency of which group of elements can cacuse inhibition of cell division in plants ?A. N, K, Mg, S, FeB. N, K, SC. Ca, Mg, CuD. N,K,Mo |
| Answer» Correct Answer - B | |
| 474. |
Lack of low level of _________ causes an inhibition of cell division. `A. Ca, Mg, Cu, KB. N, K, S, MoC. N, K, Mg, S, FeD. Zn, Mo, Mn |
| Answer» Correct Answer - B | |
| 475. |
Name one non-symbiotic nitrogen fixing prokaryote . |
| Answer» Azotobacter is a non-symbotic nitrogen fixing prokaryote. It flourishs in the rice fields. | |
| 476. |
Which one of the following plant functions as symbiotic nitrogen-fixing plant?A. AzollaB. CyacasC. MossD. Marchantia |
| Answer» Correct Answer - A | |
| 477. |
Deficiency of which group of elements can cacuse inhibition of cell division in plants ?A. N, K, SB. Mg, Cu, PC. Ca, Mg, CuD. N, K, Ca |
| Answer» Correct Answer - A | |
| 478. |
Which of the following is a non-symbiotic nitrogen fixing prokaryote?A. AzotobacterB. ClostridiumC. BeijerinckiaD. all of these |
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Answer» Correct Answer - D Non symbiotic nitrogen fixing bacteria e.g., Azotobacter, Beijernckia (both aerobatic) and Bacillus Klebsiella, Clostridium (all anaerobic) are saprotrophic bacteria that perform nitrogen fixation. |
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| 479. |
Most common form of nitrogen uptake and usable forms for plants are respectively.A. `NO_3^(-), NO _ 2 ^(-) `B. ` N H _ 3 , NO_(3) ^(-) `C. ` NO _ (3) ^(- ), NH _ 3 `D. ` NH_ 3 , NO _ 2 ^( - ) ` |
| Answer» Correct Answer - C | |
| 480. |
The process of conversion of ` NH_(4) to NO_(2) to NO_(3)` is calledA. AmmonificationB. NitrificationC. `N_(2)` flxationD. Denitrification |
| Answer» Correct Answer - B | |
| 481. |
A prokaryote responsible for converting ammonia to nitrites isA. NitosomonasB. NitrobacterC. NitrocystisD. Rhizobium |
| Answer» Correct Answer - A | |
| 482. |
The process of conversion of ` 2 NO_3 ^(- ) to 2 NO _ 3 ^(-) to 2 NO to N _ 2 O to N _ 2 ` is called ________ and is done byA. Nitrification, NitrosomonasB. Denitrification, PseudomonasC. Nitrate assimilation, RhizobiumD. Ammonification, Bacillus |
| Answer» Correct Answer - B | |
| 483. |
Conversion of ` NO_3 to NO _ 2 to NH_ 3 ` is called ___ and is catalysed by ___________.A. Nitrate assimilation, nitrate and nitrite reductaseB. Nitrification, nitrate and nitrite reductaseC. Ammonification, glutarmate dehydrogenaseD. Denitrification, transaminase |
| Answer» Correct Answer - A | |
| 484. |
Conversion of `NH_3 to NO_2^(-) to NO_3^(-) ` is calledA. AmmonificationB. NitrificationC. DenitificationD. Biological `N_2 ` - fixation |
| Answer» Correct Answer - B | |
| 485. |
Zinc is aA. tracer elementB. trace elementC. macronutrientD. monomineral nutrient |
| Answer» Correct Answer - 2 | |
| 486. |
Which of the following is a free living nitrogen fixing bacteria ?A. RhizobiumB. AzotobacterC. NitrococcusD. Both (1 ) & (2) |
| Answer» Correct Answer - B | |
| 487. |
The free living , aerobic and saprotrophic `N_2 ` - fixing microbe isA. AzotobacterB. RhodospirillumC. RhizobiumD. Anabaena |
| Answer» Correct Answer - A | |
| 488. |
_______is a free-living `N_(2)`-fixing aerobic bacterium.A. RhodospirillumB. AzotobacterC. ClostridiumD. Rhizobium |
| Answer» Correct Answer - B | |
| 489. |
Essential micronutrients are also known asA. tracer elementsB. trace elementsC. radioisotopesD. frame work elements |
| Answer» Correct Answer - 2 | |
| 490. |
Give one example of free -living `N_2 ` fixing bacteria. |
| Answer» Correct Answer - Azotobacter | |
| 491. |
Which one of the following statements can best explain the term critical concentration of an essential element?A. Essential element concentration below which plant growth is retardedB. essential element concentration below which plant growth becomes enhancedC. Essential element concentration below which plant remains in the vegetative phaseD. none of the above |
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Answer» Correct Answer - A The limited concentratio of essential element below which plant growth is retarted/stunted is termed as critical concentration. |
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| 492. |
What is critical concentration ? |
| Answer» The concentration of the essential element below which plant growth is retarded is termed as critical concentration. | |
| 493. |
What is influx ? |
| Answer» Inward movement of ions into the cells is called inlux. | |
| 494. |
Name two elements which are mobile in plants. |
| Answer» Nitrogen and phosphorus | |
| 495. |
Which of the following elements is most mobile in plant metabolism?A. CalciumB. PhosphorusC. CarbonD. Magnesium |
| Answer» Correct Answer - B | |
| 496. |
Which of the following is a mobile mineral element in the plants?A. CaB. MoC. FeD. Cu |
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Answer» Correct Answer - 2 According to Noogle and Fritz the immobile elements incude - sulphur, iron, boron, maganese and calcium. Some consider copper also an immobile element. |
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| 497. |
Which of the following groups of elements are mobile ?A. Fe, Ca, BB. Cl, KC. B, K, ND. Ca, Mg, P |
| Answer» Correct Answer - B | |
| 498. |
Which of the following elements are required for chlorophyll synthesis?A. Fe and MgB. Mo and CaC. Cu and CaD. Ca and K |
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Answer» Correct Answer - A Magnesium is a constituent of the ring structure of chlorophyll. Iron (Fe) also plays an important role in the formation of chlorophyll, though it is not found in the constitution of the chlorophyll. |
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| 499. |
Which of the following is not caused by deficiency of mineral nutritionA. chlorosisB. etiolationC. shortening of internodesD. necrosis |
| Answer» Correct Answer - 2 | |
| 500. |
Which of the following is not caused by deficiency of mineral?A. chlorosisB. etiolationC. shortening of internodesD. necrosis |
| Answer» Correct Answer - 2 | |