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.
| 351. |
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented byA. leghaemoglobinB. xanthophyllC. caroteneD. cytochrome |
| Answer» Correct Answer - 1 | |
| 352. |
Which mineral is responsible for determining solute concentration is cell along with `Na^(+)` and `K^(+)` ? |
| Answer» Correct Answer - Chlorine | |
| 353. |
Which of the following is the only monovalent cation essential for plant growth ?A. ZnB. MnC. KD. Mg |
| Answer» Correct Answer - C | |
| 354. |
Why is molybdenum required by plants ? |
| Answer» Molybdenum is a component of several enzymes, including nitrogenase and nitrate reductase, both of which participate in nitrogen metabolism. | |
| 355. |
Which trace element is absorbed as monovalent anion ? |
| Answer» Correct Answer - Chlorine | |
| 356. |
a plant requires magnesium for :A. Holding cells togetherB. Protein sysnthesisC. chlorophyll synthesisD. cell wall development |
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Answer» Correct Answer - C Magnesium is an important constituent of chlorophyll molecule. Thus, a plant requires magnesium for chlorophyll synthesis. |
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| 357. |
a plant requires magnesium for :A. Cell wall developmentB. Holding cells togetherC. Protein synthesisD. Chlorophyll synthesis |
| Answer» Correct Answer - D | |
| 358. |
Which element is essential for the photolysis of water?A. NitrogenB. ManganeseC. CarbonD. Oxygen |
| Answer» Correct Answer - B | |
| 359. |
In nature, organic compounds invariable containA. CarbonB. PhosphorusC. SulphurD. Magnesium |
| Answer» Natural organic compounds are generally made up of carbon, hydrogen and oxygen. | |
| 360. |
Which one of the following nutrient serves as micro elements for plant growthA. Manganese, copper, calcium, zincB. Sodium, potassium, boron, chlorineC. Sodium, nickel, chlorine, copperD. Copper, molybdenum, zinc, nickel |
| Answer» `Cu(mu m//gm),Zn(20 mum//m) and Mo(mu m//g)` are required for plant growth. | |
| 361. |
Nitrogen-fixing bacterium isA. FrankiaB. AcetobacterC. MycoplasmaD. Chlamydia |
| Answer» Correct Answer - A | |
| 362. |
Assertion: Reductive amination involves the transfer of amino group from one amino acid to the keto group of a keto acid. Reason: In reductive amination, transfer of `NH_(2)` from glutamic acid takes place.A. If both assertio and reason are true and reason is the correct explanation of assertionB. if both assertion and reason are true but reason is not the correct explanation of assertionC. if assertion is true but reason is falseD. if both assertion and reason are false |
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Answer» Correct Answer - D In reductive amination in the presence of enzyme glutamate dehydrogenase and a reduced coenzyme (NADH or NADPH), ammonia can directely combine with `alpha`-ketoglutaric acid to from a an amino acid. On the other hand, transamination is transfer of amino group `(-NH_(2))` of one amino acid with the keto group (gt C=O) of keto acid. in transaminase, transfer of `NH_(2)` from glutamic acid takes place. The enzyme required is transaminase or aminostransferase. |
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| 363. |
In reductive amination, the product isA. `alpha`-ketoglutaric acidB. glutamineC. glutamateD. alanine |
| Answer» Correct Answer - C | |
| 364. |
A : Jar for nutrient solution culture contains a split cover with holes which hold a bent tube for aeration. R : Regular aeration of culture solution is necesaary for proper growth and activities of roots.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion.B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.C. If Assertion is true statement but Reason is false.D. If both Assertion and Reason are false statements. |
| Answer» Correct Answer - A | |
| 365. |
Assertion: Nitrate present in the soil is reduced to nitrogen by the process of denitrification Reason: Denitrification is carried by bacteria Pseudomonas asnd Azotobacter.A. If both assertio and reason are true and reason is the correct explanation of assertionB. if both assertion and reason are true but reason is not the correct explanation of assertionC. if assertion is true but reason is falseD. if both assertion and reason are false |
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Answer» Correct Answer - C The nitrate formed by nitrification is absorbed by plants and is transported to the leaves. In leaves, it is reduced to form ammonia that finally forms the amine group of amino acids. Nitrate present in the soil is also reduce to nitrogen by the process of denitrication. Denitrification is carried by bacteria Pseudomonas and Thiobacilus. |
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| 366. |
In plants, nitrate is reduced to ammonium state in two steps, in second step, electrons are donated byA. ferredoxinB. nitrate reductaseC. nitrite reductaseD. cytochrome-`b_(5)` |
| Answer» Correct Answer - A | |
| 367. |
A : All the diverse minerals element found in plants are not essential for them. R : Some plants accumulate heavy and toxic minerals such as gold and selenium from the soil.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion.B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.C. If Assertion is true statement but Reason is false.D. If both Assertion and Reason are false statements. |
| Answer» Correct Answer - B | |
| 368. |
Some plants can store ammonium ions, even though they are highly toxic. These plants areA. BegoniaB. OxalisC. PaddyD. Both (a) and (b) |
| Answer» Correct Answer - D | |
| 369. |
The abscent of minerals isA. equal to the rate of translocation of waterB. dependent on transpiration pullC. through xylem vesselD. All of the above |
| Answer» Correct Answer - 4 | |
| 370. |
A small rootless aquatic herb in which a portion of leaf foms a tiny sach or bladder which traps water insects isA. DionaeaB. UtriculariaC. SarraceniaD. Drosera |
| Answer» Correct Answer - B | |
| 371. |
Nitrogen-fixation refers toA. conversion of soil nitrogen into atmospheric nitrogn `(N_(2))`B. converseion of atmospheric molcular nitrogen `(N_(2))` into easily absorbable formsC. utilisation of nitrogen compounds in the soil by the plantsD. none of the above |
| Answer» Correct Answer - B | |
| 372. |
The elements that take part in catalytic reactions areA. carbon, hydrogen, oxygenB. zinc, manganese, copperC. phosphorus, potassium, oxygenD. nitrogen, oxygen, zinc |
| Answer» Correct Answer - B | |
| 373. |
Abiological nitrogen fixation in industries occurs atA. high temperatureB. low pressureC. low temperatureD. both (b) and (c) |
| Answer» Correct Answer - A | |
| 374. |
Nitrogen-fixation in the environment is doneA. mostly aniologicallyB. mostly biologicallyC. only abiologicallyD. only biologically |
| Answer» Correct Answer - B | |
| 375. |
During natural abiological nitrogen fixation, the end product isA. nitrateB. nitriteC. ammoniiaD. nitric acid |
| Answer» Correct Answer - D | |
| 376. |
Match the column I with Column II. A. A- 2, B- 1, C- 3, D- 4B. A- 1, B- 2, C- 3, D- 4C. A- 1, B- 3, C- 4, D- 2D. A- 2, B- 3, C- 1, D- 4 |
| Answer» Correct Answer - 1 | |
| 377. |
Give one function of boron in plants. |
| Answer» Boron helps in translocation of cargohydrates through phloem. | |
| 378. |
Which of the following is not a deficiency symptoms of minerals?A. Internode shorteningB. NecrosisC. ChlrosisD. Etiolation |
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Answer» Correct Answer - D Etiolation is the abnormal form of growth observed when plantws grow in darkness or severely reduced lights. Such plants characteristically have branched leaves and shoots, excessively long shoots, and reduced leaves and shoots, excessively long shoots, and reduced leaves and roots systems. |
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| 379. |
What do you mean by necrosis ? |
| Answer» It refers to the death of tissue, particularly leaf tissue. | |
| 380. |
Match the column I with Column II. A. A- 2, B- 1, C- 3, D- 4B. A- 1, B- 2, C- 3, D- 4C. A- 1, B- 3, C- 4, D- 2D. A- 2, B- 3, C- 1, D- 4 |
| Answer» Correct Answer - 1 | |
| 381. |
Deficiency of which of the following elements delay flowering in plants?A. Fe, Mn, MoB. N, S, MoC. Ca, Mg, KD. N, K, S |
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Answer» Correct Answer - B Nitrogen deficiency causes yellowing of older leaves (chlrosis). Deficiency of nitrogen also causes dormancy of lateral buds, late flowering, purple colouratio and wrinkling of cereal grains molybdenum deficiency causes chlorotic interveinal mottling of the older leaves, flower formation is inhibited and also causes whip tail disease in cualiflower plants. sulphur deficiency causes yellowing of leaves and delay in flowering. |
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| 382. |
Most minerals in a soil are in theA. sandB. clayC. siltD. air pockets |
| Answer» Correct Answer - 2 | |
| 383. |
Name the elements whose deficiency leads to delay in flowering. |
| Answer» Correct Answer - N, S and Mo | |
| 384. |
Gray spots of oat are caused due to deficiency ofA. CuB. ZnC. MnD. Fe |
| Answer» Correct Answer - 3 | |
| 385. |
What is the role fo molybdenum?A. Nitrogen fixationB. Flower inductionC. Chromosome contractionD. Carbon assimilation |
| Answer» Correct Answer - 1 | |
| 386. |
Osmolarity of cells is mainly due toA. `K^(+)`B. `Mn^(++)`C. `Ca^(++)`D. `Cl^(-)` |
| Answer» Correct Answer - 1 | |
| 387. |
Plastocyanin containsA. MoB. MgC. CuD. Zn |
| Answer» Correct Answer - 3 | |
| 388. |
Plastocyanin containA. MoB. MgC. CuD. Zn |
| Answer» Correct Answer - 3 | |
| 389. |
Stomata of a plant open due toA. Influx of potassium ionsB. Efflux of potassium ionsC. Influx of hydrogen ionsD. Influx of calcium ions |
| Answer» Correct Answer - A | |
| 390. |
Stomata of CAM plantsA. Are always openB. Open during the day and close at nightC. Open at night and close during the dayD. Never open |
| Answer» Correct Answer - C | |
| 391. |
Choose the correct statement.A. Solution culture (hydroponics ) contains all essential elements except one, the usefulness of which is to be determinedB. In Aeroponics roots are dipped in solution culture rich in airC. Potometer is used to measure degree of opening of stomataD. All of the above |
| Answer» Correct Answer - 1 | |
| 392. |
Excess of manganese may induce the deficiencies ofA. IronB. CalciumC. MagnesiumD. All of these |
| Answer» Correct Answer - D | |
| 393. |
Partial mineral element isA. NB. PC. KD. S. |
| Answer» Correct Answer - A | |
| 394. |
Copper deficiency leads toA. ExanthemaB. Whiptail of cauliflowerC. Little leaf conditionD. Interveinal chlorosis |
| Answer» Correct Answer - A | |
| 395. |
Phosphorus is found maximum inA. RootsB. FruitsC. FlowersD. None of these |
| Answer» Correct Answer - B | |
| 396. |
Which of the following components are associated with nitrate reductase activity? 1. Reduced pyridine nucleotide 2. Flavin adenine dinucleotide 3. Molybdenum 4. Boron Select the correct answer using the codes given belowA. 1, 2 and 3B. 1 and 2C. 2, 3 and 4D. 1, 3 and 4 |
| Answer» Correct Answer - 1 | |
| 397. |
which one of the following helps in asbsorption of phosphorus from soil by plants?A. AnabaenaB. GlomusC. RhizobiumD. Frankia |
| Answer» Correct Answer - B | |
| 398. |
Read the following statements and select the incorrect ones. (i). The co-cordinated activites of the legume and Rhizobium bacteria depend on chemical interations between the symbiotic partners. (ii). Leguminous roots secrete chemical attractants that attract Rhizobium bacteria living nearby. (iii). N,P and K usually do not get dificint in soil due to their low plant requirement (iv). Nitrogen cycle is regular circulation of nitrogen amongst oliving organisms with its reservoir pool in lithosphere and cycling pool in atmosphere.A. (i) and (ii)B. (ii) and (iii)C. (iii) and (iv)D. (ii), (iii) and (iv) |
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Answer» Correct Answer - C Nitrogen (N), phosphorus (P) and potassium (K) are referred to as critical elements for crop plants because thay become easily deficient in the soil due to higher plant requirement and repeated cultivation. Nitrogen cycle is regular circulation of nitrogen amongst living organisms, with its reservoir pool in atmosphere and cycling pool in lithosphere. |
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| 399. |
Rapid deterioration of root and shoot tip occurs due to the deficiency ofA. CalciumB. PhosphorusC. NitrogenD. Carbon |
| Answer» Meristematic regions found is stem, leaf and root tips are greatly affected by the absence of calcium because it is not rapidly translocated to these regions. Ultimately they die and thus stop the growth of these organs. Calcium involved in selective permeability of cell membranes. It activates certain enzymes required for development of stemand root apex and as calcium pecatate in the middle lamella of the cell well. | |
| 400. |
Phosphorus (P) is a structural element ofA. cell membranesB. proteinsC. nucleic acidsD. all of these |
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Answer» Correct Answer - D Phosphorus (P) is a constituent of cell membranes, certaini proteins, all nucleic acids and nucleotides and is required for all phosphorylation reaction. It is useally found in nucleoproteins and protoplasm. |
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