InterviewSolution
Saved Bookmarks
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.
| 251. |
K, N, Ca, Mg deficiency causesA. ChlorosisB. Leaf curlC. ExanthemaD. Little leaf |
| Answer» Magnesium is a component of prophyric part of chlorophyll molecule | |
| 252. |
The possible resource of phosphorus ions and nitrogen ions in soil generally get depleted because they are usually found asA. Positively charged ionsB. Negatively charged ionsC. A disproportionate mixture of negatively charged ionsD. Particles carrying no charge |
| Answer» Phosphorus is absorbed by the plants from the soil in the form of phosphate ions `H_(2) PO_(4)^(-)` and `HPO_(4)^(2-)` and nitrogen is absorbed by the plants in the form of nitrate ions `(NO_(3)^(-))` | |
| 253. |
Which element is require for the gemination of pollen grain Or Which of the following element is very essential for uptake and utilization of `Ca^(2+)` and membrane functionA. Boron, zinc, maganeseB. CalciumC. ChlorineD. Potassium |
| Answer» Boron has some role in the osmoregulation during the in vitro pollen fermination. Boron is responsible for maintaining the solubility of calcium in cells. | |
| 254. |
Yellowish edges appear in leaves deficient inA. potassiumB. calciumC. magnesiumD. phosphorus. |
|
Answer» Correct Answer - A Potassium `(K^(+))` is usually found in the growing regions of plants. It is one of the constituents of the protoplasm in the scarcity of potassium, the normal edges of the leaves become yellowish, and the stem becomes somewhat thin. The plants take potassium from te soil in the form of potassium nitrate and potassium chloride. |
|
| 255. |
The appearance of yellow edges to leaves is due to deficiency of this mineral elementA. CalciumB. MagnesiumC. PotassiumD. Sulphur |
| Answer» The foliage leaves are the first to suffer its deficiency. Their tips become scorched and margins become dull yellow in colour. | |
| 256. |
Complete fertilisers includeA. N,P and KB. Ca,Mg and KC. N,Ca and MgD. None of these |
| Answer» Correct Answer - A | |
| 257. |
Which of the following is a nitrogen-fixing organism?A. Some BGAB. RhizobiumC. Both (1) and (2)D. Aspergillus |
| Answer» Correct Answer - C | |
| 258. |
Name a plant, which accumulate silicon. |
| Answer» Oryza sativa and Triticum aestivum are silicon accumulators. These plants actively absorb silicon and accumulate them in their biomass. | |
| 259. |
If by radiation all nitrogenase enzyme are inactivated, then there will be no:-A. fixation of atomspheric nitrogenB. conversion from nitrate to nitrite in legumesC. conversion from ammonium to nitrate in soilD. fixation of nitrogen in legumes |
| Answer» Correct Answer - 4 | |
| 260. |
In plants, inulin and pectin areA. reserved food materialB. WastesC. secretory materialD. insect attracting material |
|
Answer» Correct Answer - A Inulin a polymer of fructose, is used as a food store particularly in roots and tubers of family-compositae. Pectin is a mucopolysaccharide which is found in cell wall of plants. During the time of food ripiening, the pectin becomes hydrolyse and gives rise the constituents of sugar. |
|
| 261. |
Passive absorption of minerals depend onA. temperatureB. temperature and metabolic inhibitorC. metabolic inhibitorD. humidity |
|
Answer» Correct Answer - A Metabolic inhibitors affect active absorptioin. Humidity does not affect absorption of minerals as much as temperature. The movement of mineral ions into the root cells by the process of simple diffusion is called as passive absorption. This is spontaneous process and does not required energy. |
|
| 262. |
Which one of the following is corretly matched?A. Passive transport of nutrients-ATPB. Apoplast-PlasmodesmataC. Potassium-Readily immobilisationD. Bakane of rice seedlings-F Skoog |
|
Answer» Correct Answer - C Active transport of nutrients require ATP. Symplast includes translocation through plasmodesmata. Bakane disease of rice was found by Hori (1918) to e caused due to Gibberella fijikuroi. None of the options is correct Option (c) may be correct if statement be read as "potassium readily mobilisation" instead of "Potassium readily immobilisation. |
|
| 263. |
Which one of the following helps in the absorption of phosphorus from soil by plants?A. RhizobiumB. FrankiaC. AnabaenaD. Glumus |
|
Answer» Correct Answer - D Glumus is a genus of arbuscular mycorrhizal fungi, which form symbiotic relationships with plants roots. It is a longest genus of AM fungi but it is curretnly definied as non-monphylactic. Mo, Zn and B are micronutrients. |
|
| 264. |
Cell elongation is adversely afected by Or Element required by plant in large quentity isA. SodiumB. CobaltC. ManganeseD. Nitrogen |
|
Answer» Correct Answer - d The deficiency of nitrogen causes chloroses in leaves of the plants and the cell division as well as cell elongation is stopped, due to which plants remain drawf and production of flowers, fruits and seeds is decreased. |
|
| 265. |
Minerals known to be required in large amounts for plant growth includeA. Magnesium, sulphur, iron, zincB. Phosphorus, potassium, manganese, copperC. Calcium, magnesium, manganese, copperD. Potassium, phosphorus, selenium, boron |
| Answer» Correct Answer - B | |
| 266. |
Refer to the given reaction `alpha`-Ketoglutaric acid `+NH_(4)^(+)+NADPHunderset("dehydrogenase")overset("Glutamate")to"Glutamate"+H_(2)O+NADP` is representsA. oxidative aminationB. reductive aminationC. transaminationD. deamination |
|
Answer» Correct Answer - B The given reaction shows reductive amonation. In the presence of dehydrogenase (e.g., glutamate dehydrogenase, aspartate dehydrogenase) and a reduced coenzyme (NADH or NADPH), ammonia can directly combine with a keto organic acid like `alpha`- ketoglutaric acid or oxaloacetic acid to form amino acids. |
|
| 267. |
Minerals known to be required in large amounts for plant growth includeA. Calcium, magnesium, manganese, copperB. Potassium, phosphrous, selenium, boronC. Magnesium, Sulphur,iron, zincD. Phosphorus, potassium, sulphur. Calcium |
|
Answer» Correct Answer - d |
|
| 268. |
When a cell contains some nondiffusible or fixed ions which are kept balanced by diffusible ions of opposite charge , this condition is known asA. Donnan equilibriumB. Chemical equilibriumC. Saturation effectD. Ionic exchange |
| Answer» Correct Answer - 1 | |
| 269. |
Toxicity of Mn in plant may cause deficiency of . . . In plants,A. Fe and MgB. S, P and KC. Ca, Cl and MgD. N, P and Mn |
| Answer» Correct Answer - B | |
| 270. |
Point out the one which does not justify active absorption of minerals ?A. Cations and anions are often absoebed at different ratesB. Absorption of different ions is highly selectiveC. absorption is accompanied by increase in the rate of respirationD. Absorption is the movement of substances from higher concentration to their lower concentration |
| Answer» Correct Answer - 4 | |
| 271. |
Reclamation disease of cereals and legumes is caused by the deficiency ofA. manganeseB. phosphorusC. copperD. boron |
| Answer» Correct Answer - 3 | |
| 272. |
Which of the following is not caused by deficiency of mineral nutritionA. EtiolationB. Shortening of internodeC. NecrosisD. Chlorosis |
| Answer» Correct Answer - A | |
| 273. |
Assertion: Necrosis occurs due to deficiency of Ca, Mg, Cu and K. Reason: Necrosis is the death of tissue, particularly leaf tissue.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 |
|
Answer» Correct Answer - B Necrosis is the prematrue death of cells in living tissue. It is symptom os a disease. This symptom can occur in any plant tissues such as leaves, petioles, stem, etc. necrosis may appear in small areas and goes up to large areas of plant tissues. The apical necrosis of young leaves extends towards the base along the margins. Necrosis occurs due to deficiency of Ca, Mg, Cu and K. |
|
| 274. |
Necrosis, or death of tissue particularly leaf tissue, is due to the deficiency ofA. Ca, K, S and MoB. N, K, S and MoC. N, S, Fe and ZnD. Mg, S, Mn and Ca |
| Answer» Correct Answer - A | |
| 275. |
Death of leaf tissues in plants is caused by deficiency ofA. Ca and MgB. Zn and SC. Mo and SD. Mo and C |
| Answer» Correct Answer - A | |
| 276. |
"Reclamation" and "Little leaf" disease, caused by deficency ofA. Zn and MoB. Cu and ZnC. Cu and BD. Mn and Cu |
| Answer» Correct Answer - B | |
| 277. |
By the reaction of `alpha`- ketoglutaric acid with ammonia, through which of the process glutamic acid is formed?A. oxidative aminationB. reductive aminationC. ammonificationD. transamination |
| Answer» Correct Answer - 2 | |
| 278. |
Reaction of a-ketoglutaric acid with ammonia to form glutamic acid isA. oxidative aminationB. reductive aminationC. trans aminationD. ammonification |
| Answer» Correct Answer - D | |
| 279. |
Sulphur is a constituents of which of the following amino acids?A. ThreonineB. CysteineC. MethionineD. both b and c |
|
Answer» Correct Answer - D Sulphur (S) is the constituent of two amino acids, i.e., cysteine and methionine, and hence proteins, several coenzymes, vitamins (i.e., thiamine, biotin), lipoic acid and ferredoxin. |
|
| 280. |
Which of the following minerals activate the enzymes involved in respiration?A. Nitrogen and phoshorusB. Magnesium and manganeseC. Potassium and calciumD. Sulphur and iron |
|
Answer» Correct Answer - B Magnesium activates the enzymes of respiration, photosynthesis and is involved in the synthesis of DNA and RNA. Manganese activates many enzymes involved in photosynthesis, respiration and nitrogen metabolism. |
|
| 281. |
Which of the following minerals activate the enzymes involved in respiration?A. Nitrogen and phosphorusB. Magnesium and manganeseC. potassium aned calciumD. Sulphur |
|
Answer» Correct Answer - B Magnesium activates the enzymes of respiration, photosynthesis and is involved in the synthesis of DNA and RNA. Manganese activates many enzymes which are involved in photosynthesis, respiration and nitrogen metabolism. |
|
| 282. |
The process of converting ammonia to nitrate by bacteria is known asA. AmmonificationB. NitrificationC. Nitrogen fixationD. Denitrification |
| Answer» Correct Answer - B | |
| 283. |
Cuscuta is an example of aA. PredationB. EndoparasitismC. EctoparasitismD. Brood parasitism |
|
Answer» Correct Answer - 3 Cuscuta (Amarbel) is a total stem ectoparasite. |
|
| 284. |
The element required by an enzyme urease to hydrolyse urea by living organismsA. nickelB. calciumC. boronD. potassium |
| Answer» Correct Answer - A | |
| 285. |
Which of the following micronutrients is essential for activation of urease, the enzyme involved in nitrogen metabolism ?A. BoronB. MolybdenumC. ZincD. Nickel |
|
Answer» Correct Answer - 4 Urease is a Nickel containing enzyme which catalyses the conversion of urea to `CO_(2) and NH_(3)`. |
|
| 286. |
Which element is a component of urease enzyme? |
| Answer» Correct Answer - Nickel | |
| 287. |
Write the reaction involved in `N_2 `- fixation |
| Answer» `N_2 + 8e^(-) + 8 H^(+) + 16 ATP to 2 NH_3 + H_2 + 16 ADP + 16P_i` | |
| 288. |
Choose the correct one.A. C, H, O are called frame work elementsB. `Ca^(2+), Mg^(2+), K^(+)` are protoplasmic elementsC. C, H, O, N are balancing elementsD. All of the above |
| Answer» Correct Answer - 1 | |
| 289. |
Match column I with column II and select the correct option from the given codes: `{:("Column I","Column II"),(A" nitrosomones Nitrosococcus",(i)." Ammonia to nitrite"),(B" Nitrobacter,Nitrocystic",(ii)." Nitrite to nitrate"),(C" Pseudomonas",(iii)." Nitrate to "N_(2)):}`A. A-(i),B-(ii),C-(iii)B. A-(i),B-(iii),C-(ii)C. A-(ii),B-(i),C-(iii)D. A-(ii),B-(iii),C-(i) |
| Answer» Correct Answer - A | |
| 290. |
Symbiotic bacteria are found in the root nodules of members familyA. SolanaceaeB. AsteraceaeC. LeguminosaeD. Malvaceae |
| Answer» Correct Answer - C | |
| 291. |
The `N_(2)` -fixing bacterium associated with root nodules of legumes is known asA. AzotobacterB. NitrobacterC. LactobacillusD. Rhizobium |
| Answer» Correct Answer - D | |
| 292. |
Primary sympton of maganese toxicity isA. Appearance of brown spots surrounded by chlorotic veinsB. Loss of apical dominanceC. Little leaf diseaseD. Reclamation disease |
| Answer» Correct Answer - A | |
| 293. |
Primary sympton of maganese toxicity isA. Appearance of brown spots surrounded by chlorotic veinsB. Loss of apical dominanceC. Little leaf diseaseD. Reclamation disease |
| Answer» Correct Answer - A | |
| 294. |
Which of the given is not a beneficial element ?A. CoB. NaC. SiD. Ni |
| Answer» Correct Answer - D | |
| 295. |
Yellowish edges appear in leaves deficient in |
| Answer» Yellowish edges or chlorosis appears in the leaves, deficient in nitrogen. Nitrogen deficiency also causes delaying of flowering, interference in protein synthesis and dormacy of lateral buds. | |
| 296. |
In plant nutrition elements are classified as major or minor depending onA. Their availability in the soilB. Their relative production in the ash obtained after burning the plantsC. The relative amounts required by the plantsD. Their relative importance in plant growth |
| Answer» Major elements are required by plants in quantity of more than 1 milligram/gram dry matter and minor elements are required in quantity of less than 1 milligrams /gram of dry matter. | |
| 297. |
An essential element is oneA. Improve plant growthB. Present in plant ashC. Is indispensable for growth and is irreplaceableD. Available in soil |
| Answer» An essential element is the one which has a specific structural or physiological role and without which plants cannot complete their life cycle. | |
| 298. |
Which of the following is not a beneficial element ?A. NaB. CoC. KD. Si |
| Answer» Correct Answer - C | |
| 299. |
Complete the equation for reductive amination ......... . `+NH_(4)^(+)+NADPH overset(?)rarr "glutamate" + H_(2)O + NADP` |
|
Answer» Reductive Amination Ammonia combines with a keto acid (like `alpha`-ketoglutaric acid or oxaloacetic acid) to form amino acid in presence of a reduced coenzyme (NADH, NADPH) and enzyme dehydrogenase (e.g., glutamate dehydrogenase, aspartate dehydrogenase). `alpha`- ketoglutaric acid `+ NH_(4)^(+) + NAD (P) H underset("dehydrogenase")overset("Glutamate")rarr "Glutamate" + H_(2)O + NAD (P)` Oxaloacetic acid `+ NH_(4)^(+) + NAD (P) H underset("dehydrogenase") overset ("Aspartate") rarr "Asparatate" + H_(2)O + NAD (P)` |
|
| 300. |
Which of the following is must for chlorophyll synthesisA. FeB. MgC. KD. Mn |
| Answer» Correct Answer - 2 | |