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.
| 401. |
Phosphorus is a structural element inA. FatB. StarchC. NucleotideD. Carbohydrate |
| Answer» Nucleotide is made up by nitrogen base + surgar (ribose or deoxyribose) + phosphate | |
| 402. |
An element essential for nitrogen metabolism isA. KB. MoC. MgD. Mn |
| Answer» Correct Answer - B | |
| 403. |
Mineral present in cytochrome is commonlyA. FeB. MnC. MoD. Mg |
| Answer» Correct Answer - A | |
| 404. |
Interveinal clorosis of leaves is caused by the deficiency ofA. NitrogenB. CalciumC. PotassiumD. Magnesium |
| Answer» Mg is chief element of chlorophyll molecule | |
| 405. |
phosphorus deficiency in plantsA. decreases apical dominanceB. bring healthy root growthC. delay floweringD. All of the above |
| Answer» Correct Answer - C | |
| 406. |
The accumulation of phosphorus is more inA. older leavesB. older rootsC. younger rootsD. younger leaves |
| Answer» Correct Answer - D | |
| 407. |
Which of the following is an incorrect match ?A. Free living nitrogen fixing bacteria - AzotobacterB. Symbiotic nitrogen fixing cyanobacteria - AnabaenaC. Symbiotic nitrogen fixing cyanobacteria - FrankiaD. Symbiotic nitrogen fixing bacteria - Xanthomonas |
| Answer» Correct Answer - 3 | |
| 408. |
The source of energy for non-biological nitrogen fixation isA. by ionizing events such as lightning and effect of consmic raysB. ferredoxin enzyme and nitrogenaseC. by reduction of proteins to ammoniaD. by oxidation of ammonia to protein |
| Answer» Correct Answer - 1 | |
| 409. |
Nitrogen fixing enzyme in root nodule isA. nitraseB. nitrogenaseC. nitrosomonasD. nitrogen esterase |
| Answer» Correct Answer - 2 | |
| 410. |
Vicia faba and pisum sativum are recommended for rotaion of crops because theyA. require small amount of waterB. are cash cropsC. help in nitrogen fixation of soilD. kill all the harmful insects. |
| Answer» Correct Answer - 3 | |
| 411. |
Red pigment (Leghaemoglobin) having affinity for oxygen is present in the roots ofA. CarrotB. SonyabeanC. MustardD. Radish |
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Answer» Correct Answer - 2 Soyabean is a leguminous plant and its roots are nodulated containing nitrogen fixing bacteria and leghaemoglobin (red pigment) act as oxygen scavanger. |
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| 412. |
White-bud condition in maize is produced due to the deficiency ofA. ironB. molybdenumC. zincD. boron |
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Answer» Correct Answer - 3 In the case of acute deficiency of zinc, leaves are completely chlorotic (white bud). |
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| 413. |
Root of which plant contains a red pigment that has affinity for oxygen ?A. CarrotB. SonyabeanC. MustardD. Radish |
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Answer» Correct Answer - 2 Soyabean is a leguminous plant and its roots are nodulated containing nitrogen fixing bacteria and leghaemoglobin (red pigment) act as oxygen scavanger. |
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| 414. |
Which of the following can use elemental nitrogen as their nitrogen sourceA. anabaenaB. NitrobacterC. NitrosomonasD. All of the above |
| Answer» Correct Answer - 1 | |
| 415. |
Select the incorrectly matched pair.A. Magnesium (Mg)-Formation of mitotic spindleB. Iron (Fe)-Formation of chlorophyllC. Chlorine (Cl)-Anion cation balance in the cellD. Sulphur(S)-Component of vitamins |
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Answer» Correct Answer - A Major function of magnesium `(Mg^(2+))` is formation of chlorophyll, carotenoids and nucleic, acids, growth, metabolism and nodule formation in legumes `Ca^(2+)` is involved in the organisation of mitotic spindle. |
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| 416. |
Minerals associated with redox reaction areA. N, CuB. Fe, CuC. Fe, KD. Mn, Mo |
| Answer» Correct Answer - B | |
| 417. |
Minerals associated with redox reaction areA. Na,CuB. N,CuC. Fe,CuD. Ca,Fe |
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Answer» Correct Answer - C Fe is an important constituent of proteins like ferredoxin and cytochromes which are involved in transfer of electrons. It si reversible oxidised from `Fe^(2+)` to `Fe^(3+)` during electron transfer. It activates catalase enzyme and is essential for the formation of chlorophyll. Copper helps in formation of starch. it is required for the overall metabolism in plants. it is associated with certain enzymes involved in redox reactions and is reversible oxidised from `Cu^(+)` to `Cu^(2+)` |
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| 418. |
The translocation of solute isA. Equal to the rate of translocation of waterB. Dependent on transpiration pullC. Through xylem vesselD. All of these |
| Answer» Correct Answer - D | |
| 419. |
In plants a common symptom caused by deficiency of P, K, Ca and Mg isA. bending of leaf tipsB. formation of anthocyaninC. poor development of vasculatureD. chlorosis |
| Answer» Correct Answer - 4 | |
| 420. |
Plant having nitrogen fixing bacteria isA. cottomB. wheatC. gramD. mustard |
| Answer» Correct Answer - C | |
| 421. |
Match the following mineral element with their deficiency symptom and choose the coorect option `{:(,"Column I",,"Column II",),(A,"Calcium",1,"Chlorotic veins",),(B,"Potassium",2,"Delayed germination of seeds",),(C,"Zinc",3,"Necrosis of young leaves",),(D,"Iron",4,"Scoroched leaf tips",),(E,"Phosphorous",5,"Malformed leaves",):}`A. A-3, B-1, C-5, D-2, E-4B. A-1, B-4, C-5, D-3, E-2C. A-3, B-4, C-5, D-1, E-2D. A-2, B-3, C-4, D-1, E-5 |
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Answer» Correct Answer - c |
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| 422. |
Which of the following is considered to be the best chemical method of fixing atmopheric nitrogenA. Fisher methodB. Decan methodC. Haber-Bosch methodD. Paranas-Meyerhoff method |
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Answer» Correct Answer - c |
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| 423. |
Refer to the given reacton, what does it depict? `underset("Amino-donor")(R_(1)-underset(NH_(3)^(+))underset(|)overset(H)overset(|)(C)-COO^(-))+underset("Amino-acceptor")(R_(2)-underset(O)underset(||)(C)-C)OO^(-)hArrR_(1)underset(O)underset(||)(C)-COO^(-)+R_(2)-underset(NH_(3)^(+))underset(|)overset(H)overset(|)(C)-COO^(-)`A. oxidative aminationB. reductive aminationC. transaminationD. deamination |
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Answer» Correct Answer - C Transamination is the transfer of amino group of one amino acid to the keto group of keto acid. The enzyme required is transaminase or aminotransferase. |
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| 424. |
Mineral ion concentration in tissues that reduces the dry weight of tissues by about 10% is considered asA. critical concentrationB. toxic concentrationC. optimum concentrationD. beneficial concentration |
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Answer» Correct Answer - B In higher doses, micronutrients, become toxic. Mineral ion concentration in the tissues which reduces dry weight of tissues by 10% is called toxic concentration. Critical toxic concentration. Critical toxic concentration is different for different micronutrients as well as different plants. for example `Mn^(2+)` is toxic beyond 600 `mu` `g^(-1)` for soybeam and beyond `5300mug` `g^(-1)` for sunflower toxic effects may be due to an excess of the micronutrient or its interference in the absorption and functioning of other nutrients. |
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| 425. |
Hydroponics areA. Growing of aquatic plantsB. Growing of floating aquatic plantsC. Growing of plants is sandD. Growing of plants aqueous balanced nutrient |
| Answer» Soilless production of plants is called hydroponics. A solution having all the essential elements in proper proportion is called normal or balanced nutrient solution | |
| 426. |
Necrosis meansA. Yellow spots on the leavesB. Death of tissue and decompositionC. Darking of green colour in leavesD. None of the above |
| Answer» Necrosis is death of cells of an area which therefore, becomes discoloured. | |
| 427. |
The reduction of nitrite to ammonia during nitrate assimilation is carried out byA. amino transferase and MgB. nitrogenase and ZnC. nitrite reductase and MnD. nitrite reductase and ferrodoxin |
| Answer» Correct Answer - A | |
| 428. |
Fertilizers are usually enriched in NPK which denotesA. iron, manganese and zincB. nitrogen, phosphorus and zincC. calcium and boronD. nitrogen, phosphorus and potassium |
| Answer» Correct Answer - 4 | |
| 429. |
Potassium is involved inA. photosynthesisB. promoting many enzymatic activities that regulate plant processesC. providing reddish pigmentation to fruitsD. formation of vascular cambium |
| Answer» Correct Answer - 2 | |
| 430. |
Which one is component of ferredoxin ?A. ZnB. MnC. CuD. Fe |
| Answer» Correct Answer - 4 | |
| 431. |
Nitrite ions are reduced to ammonia by ferredoxin inA. rootB. stemC. leavesD. all of these |
| Answer» Correct Answer - D | |
| 432. |
Assertion: Sulphur is the main constituent of several coenzymes, vitamins and ferredoxin. Reason: Sulphur is present in two amino acids- valine and cysteine.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 Sulphur is an important macroelement of plants. Plants obtain sulphur in the form of sulphate `(SO_(4)^(2-))`. Sulphur is present in two amino acids-cysteine and methionine and is the main constituents of several coenzymes, vitamins (thiaminie, biotin, coenzyme A) and ferredoxin. |
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| 433. |
Which of the following element is a component of ferredoxinA. CuB. MnC. ZnD. Fe |
| Answer» Ferredoxin is Fe having electron carrier which participates in photosynthesis. It plays an important role in ETS, photosynthesis and respiration because iron is the part of cytochromes. | |
| 434. |
Go through the following matches (i) Calcium - Required by meristematic and differentiating tissues (ii) Nitrogen - Mineral element required by plants in the greatest amount. (iii) Magnesium - Activates enzymes involved in DNA and RNA synthesis. (iv) Iron - Mainly obtained by plants in ferrous form Which of these are correctA. (i), (ii) and (iii)B. (ii) and (iii)C. (i), (iii) & (iv)D. All are correct |
| Answer» Correct Answer - 1 | |
| 435. |
Read the following matches (i) Boron - Pollen germination (ii) Manganese - Splitting of water during photosynthesis (iii) Zinc - Activates carboxylases (iv) Copper - Involved in redox reactions Which of these are correctA. (i), (ii) & (iii)B. (ii), (iii) & (iv)C. (i), (iii) & (iv)D. All are correct |
| Answer» Correct Answer - 4 | |
| 436. |
The most important function of Rhizobium isA. nitrogen assimilationB. nitrogen fixationC. ammonificationD. nitrification |
| Answer» Correct Answer - 2 | |
| 437. |
Which of the following is a biofertilizer?A. FunariaB. FernC. AnabaenaD. Fungus |
| Answer» Correct Answer - C | |
| 438. |
Which of the following is non-symbiotic biofertilizerA. AzotobacterB. NostocC. RhizobiumD. frankia |
| Answer» Correct Answer - 1 | |
| 439. |
Which one does not fix nitrogen?A. AzotobacterB. SpirogyraC. AnabaenaD. Nostoc |
| Answer» Correct Answer - B | |
| 440. |
Organisms that fix nitrogen in aquatic habitats areA. green algaeB. cyanobacteriaC. brown algaeD. protozoa |
| Answer» Correct Answer - 2 | |
| 441. |
On earth the largest reservoir of nitrogen isA. the oceansB. granite rocksC. the airD. the soil |
| Answer» Correct Answer - 3 | |
| 442. |
The largest resevoir of nitrogen on earth isA. soil natrure (pH)B. airC. oceanD. rocks |
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Answer» Correct Answer - B Nitrogen is the fourth most prevalent element in living systems. It is available in the atmosphere in abundance (78% of atmosphere as dinitrogen of `N_(2)`) but plants cannot directly absorb the same. Nitrogen compounds are obtained from reservoir pool through nitrogen fixation. |
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| 443. |
Insectivorous plants live in a soil that is usually deficient inA. nitrogenB. chlorideC. potassiumD. magnesium |
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Answer» Correct Answer - A Insectivours plants grow in the soil, which have poor amount of nitrogen contents (nitrate). Nitrogen is very essential for metabolism. To solve thhis problem, these plants kill and digest insects for their nitrogen contents, e.g., Nepenthes. |
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| 444. |
Carnivorous plants exhibit nutritional adaptation . Citting an example explain this fact. |
| Answer» Carnivorous (insectivorous) plants are mainly found in nitrogen deficient soil. To make up the nitrogen deficiency, they have developed insect trapping mechanism in which leaves have taken the shape of a pitcher containing insect digesting proteolytic enzymes. They trap insect and absorb the nitrogen derived from them. | |
| 445. |
Ability of Venus Fly Trap to capture insects is due toA. Chemical stimulation by the preyB. A passive process requiring no special ability on the part of the plantC. Specialized muscle - like cellsD. Rapid turgor pressure changes |
| Answer» Correct Answer - D | |
| 446. |
Which of the following pigments is essential for nitrogen fixation by leguminous plantsA. AnthocyaninB. PhycocyaninC. PhycoerythrinD. Leghaemoglobin |
| Answer» Correct Answer - d | |
| 447. |
The ability of the venus fly trap of capture insects is due toA. Chemical stimulation by the preyB. A passive process requiring no special ability on the part of the plantC. Specialized muscle-like cellsD. Rapid turgor pressure changes |
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Answer» Correct Answer - d In Dionaea (Venus fly trap) an insect that happens to alight over the lamina and touch a sensitive spine twice in quick succession causes the folding of the lamina the curved marginal spines get interolocked and the insect gets trapped |
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| 448. |
Which of the following is a part of cytochrome?A. MgB. ZnC. FeD. Ca |
| Answer» Correct Answer - C | |
| 449. |
The plants accept Zn asA. ZnB. `Zn^(2+)`C. ZnOD. `ZnSO_(4)` |
| Answer» Zinc is absorbed by the plants in ionic form | |
| 450. |
The micronutrient least required by planys isA. CalciumB. NickelC. ManganeseD. Boron |
| Answer» Recent research has shown that some element, such as cobalt, vanadium and nukel, may be essential for certain plants in very small amounts. | |