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.
| 151. |
Which is not a criterion for the essentiality of a mineral?A. Direct role in metabolismB. Requirement is specificC. Deficiency causes hunger signsD. Dispensable for growth |
| Answer» Correct Answer - D | |
| 152. |
Which one of the following is not a micronutrientA. MolybdenumB. MagnesiumC. ZincD. Boron |
|
Answer» Correct Answer - B Magnisium is an essential macronutrient found from 0.2-0.4% dry matter and is necessary for normal plant growth. Magnesium has an important role in photosynthesis because it forms the central atom of chlorophyll. |
|
| 153. |
Which one of the followign is correctly matchedA. Passive transport of nutrients - ATPB. Apoplast - PlasmodesmataC. Potassium - Readily immobilisationD. Bakane of rice seedlings - F.Skoog |
|
Answer» Correct Answer - c |
|
| 154. |
Amides are different from amino acids as they contain moreA. hydrogenB. oxygenC. nitrogenD. carbon |
|
Answer» Correct Answer - C Amides are the amino acid derivatives in which -OH of carboxylic group (-COOH) is replaced by another amino group `(-NH_(2))` |
|
| 155. |
Fly -ash is a/anA. Infection particulate matterB. Light airborne particulate matterC. New name of orchid plantD. Causal organism of various disease |
|
Answer» Correct Answer - b |
|
| 156. |
Which one is not related with plant ashA. Trace elementsB. Essential elementsC. NitrogenD. Mineral elements |
| Answer» In plant ash, nitrogen is not present because it releases out as its oxide when heated upto `600^(@)C` to obtain plant ash, however it is an essential element. | |
| 157. |
The plany ash is an indication ofA. Organic matter of plantB. Waste productC. Mineral salt absorbed by plantsD. None of these |
|
Answer» Correct Answer - c The ash that is left after burning any dry part of the plant in a crucible, contains only mineral elements and is called plant ash. |
|
| 158. |
Roots play insignificant role in absorption of water inA. WheatB. SunflowerC. PistiaD. Pea |
| Answer» Correct Answer - C | |
| 159. |
Which aquatic fern performs nitrogen fixation :A. AzollaB. NostocC. SalviaD. Salvinia |
|
Answer» Correct Answer - A the leaves of Azolla contain colonies of Anabaena azollae which have the capacity to fix atmospheirc nitrogen. |
|
| 160. |
Sulphur is an important nutrient for optimum growth and and productivity inA. fibre cropsB. cerealsC. oil seed cropsD. pulse crops |
| Answer» Correct Answer - 4 | |
| 161. |
Sulphur is an important nutrient for optimum growth and productivity inA. fibre cropsB. cerealsC. oil seed cropsD. pulse crops |
| Answer» Correct Answer - 4 | |
| 162. |
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas `(N_(2))` to the atmosphereA. Aerobic nitrate oxidation and nitrite reductionB. Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compoundsC. Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumesD. Anaerobic ammonium oxidation and denitrification |
|
Answer» Correct Answer - d |
|
| 163. |
Which of the following can utilise molecular nitrogen `(N_(2))` as nutrient for growth ?A. RhizobiumB. SpirogyraC. MucorD. Methancoccus |
| Answer» Correct Answer - A | |
| 164. |
How many electron and protons are required to fix a dinitrogen ?A. 32 eachB. 8 eachC. 16 eachD. 4 each |
| Answer» Correct Answer - B | |
| 165. |
Nitrifying bacteria:-A. Reduce nitrates to free nitrogenB. Oxidize ammonia to free nitrogenC. Convert free nitrogen to nitrogen compoundsD. Convert proteins into ammonia |
| Answer» Correct Answer - B | |
| 166. |
Study the cycle shown in Fig. 12.7 and select the option which gives correct words for all the four blanks A, B, C, and D. A. A - Nitrification B - Ammonification C - AnimalsB. A - Denitrification B - Ammonification C - Plants D - AnimalsC. A - Nitrification B - Denititrification C - Animals D - PlantsD. A - Denitrification B - Nitrification C - Plants D - Animals |
| Answer» Correct Answer - B | |
| 167. |
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas `(N_(2))` to the atmosphereA. Anaerobic ammonium oxidation, and denitrificationB. Aerobic nitrate oxidation, and nitrite reductionC. Decomposition of organic nitrogen , and conversion of dinitrogen to ammonium compounds.D. Enteric fermentation in cattle, and nitrogen fixation by Rhizobium in root nodules of legumes |
| Answer» Correct Answer - A | |
| 168. |
Which two distinct microbial processes release dinitrogen `(N_(2))` from fixed nitrogen?A. Decompose of organic nitrogen, conversion of dinitrogen to ammonium compoundsB. Enteric fermentation in cattle and nitrogen-fixation by Rhizobium in root nodules of legumesC. Anaerobic ammonium oxidation and denitrificationD. Aerobic nitrate oxidation and nitrite reduction |
| Answer» Correct Answer - C | |
| 169. |
Assertion: Some essential elements are called structural element of cells Reason: These essential elements are the components of certain biomolecules.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 - A Some essential elements plays a structural role in plants. These essential elements are carbon, hydrogen, oxygen and nitrogen. They are building blocks of macromolecules that form the bulk of plant body carbon and hydrogen are components of all organic substances. many of them also contain oxytgen nitrogen is a constituent of amino acids, proteins, nucleic acids, chlorophyll, auxin, cytokinins and vitamins. |
|
| 170. |
Saprophytes belonging to angioperms are known asA. humus plantsB. organic plantsC. facultative saprophytesD. obligate saprophytes. |
| Answer» Correct Answer - 1 | |
| 171. |
The example of a partial root parasite isA. SantalumB. CuscutaC. ArceuthobiumD. Viscum |
| Answer» Correct Answer - 1 | |
| 172. |
Drosera catches insects byA. pitcherB. adhesive padsC. bladderD. tentacles secreting shining liquid |
| Answer» Correct Answer - 4 | |
| 173. |
Cuscuta is an example of aA. heteroparasiteB. holoparasiteC. root parasiteD. semiparasite |
| Answer» Correct Answer - 2 | |
| 174. |
Gray spots of oat are caused by the deficiency ofA. CuB. ZnC. MnD. Fe |
| Answer» Correct Answer - C | |
| 175. |
The carnivorous plants live in water logged or boggy habitats which areA. deficient in nitratesB. deficient in sulphitesC. deficient in oxygenD. deficient in many salts. |
| Answer» Correct Answer - 1 | |
| 176. |
The minerals involved in waer splitting reaction during photosynthesis areA. magnesium and chlorineB. potassium and manganeseC. manganese and chlorineD. molybdenum and manganese |
|
Answer» Correct Answer - C Photolysis of water or water splitting reaction during photosynthesis is associated with pigment system-II and are catalysed by the presence of `Mn^(2+)` and `Cl^(-)` ions. `4H_(2) hArr H^(+)+4OH^(-)` `4OH^(-) underset(Mn^(2+),Cl^(-)) overset("Z coomplex")to2H_(2)O+O_(2)uarr+4e^(-)` |
|
| 177. |
Hydroponics or soilless culture helps in knowingA. essentiality of an elementB. deficiency symptoms caused by an elementC. toxicity caused by an elementD. all of these |
|
Answer» Correct Answer - D Hydroponics or soilless culture helps to know the essentiality of mineral elements, deficiency symptoms developed dur to non-availability of particular nutrient, toxicity to plant whhen element is present in excess, possible interation among different elements present in plants and role of essential element in the metabolism of plant. |
|
| 178. |
Glutamine react with . . . . In the presence of glutamate synthetase to form two molecules of glutamateA. `alpha`-ketoglutarateB. aspartateC. oxalic acidD. ammonia |
| Answer» Correct Answer - B | |
| 179. |
Elements useful in photosynthesisA. Cu, Co, FeB. Cu, Mo, ZnC. Cl, Mg, MnD. Mg, Fe, Co, Mn |
| Answer» Correct Answer - 3 | |
| 180. |
Phosphorus is always present inA. ProteinB. DNA and RNAC. Amino acidD. starch |
| Answer» Correct Answer - 2 | |
| 181. |
Phosphorus is present in `:`A. ProteinB. DNA and RNAC. Amino acidD. starch |
| Answer» Correct Answer - 2 | |
| 182. |
The Nitrobacter and NitrocystisA. oxidise nitrite to nitrateB. oxidise nitrateC. reduce nitriteD. reduce nitrate |
| Answer» Correct Answer - 1 | |
| 183. |
Reduction is the term used when conversion of ……… takes placeA. nitrate to nitriteB. nitrite to nitrateC. ammonia to nitrogenD. All of the above |
| Answer» Correct Answer - 1 | |
| 184. |
Little leaf disease is caused byA. CopperB. ZincC. ManganeseD. Cobalt |
| Answer» Correct Answer - 2 | |
| 185. |
The first stable product of fixation of atmospheric nitrogen in leguminous plants isA. GlutamateB. `NO_(2)^(-)`C. AmmoniaD. `NO_(3)^(-)` |
|
Answer» Correct Answer - c |
|
| 186. |
The cafactor of nitrate reductase isA. CuB. ZnC. CaD. Mo |
|
Answer» Correct Answer - D Reduction of nitrate to nitrite is carried out by the agency of an inducible enzyme called nitrate reductase. The enzyme is a molybdoflavoprotein (with a cofactor Mo). It requires a reduced coenzyme (NADH or NADPH) for its activity the reduced coenzyme is brought in contact with nitrate by FAD or FMN. `NO_(3)^(-)+NAD(P)H+H^(+)underset(FAD//FMN)overset("Nitrate reductase")toNO_(2)^(-)+H_(2)O+NADP^(+)` |
|
| 187. |
With the help of examples describe the classification of essential elements based on the function they perform. |
|
Answer» Essential elements are involved in performing variety of functions in plants. Some of the major functions are enlisted below (i) Frame work elements Essential elements as components of biomolecules and hence are structural elements of the cell. Carbon, hydrogen and oxygen are considered as framework elements because they constitute carbohydrates which form cell wall. (ii) Protoplasmic elements N, P and S are considered as protoplasmic elements as they form protoplasm along with C, H and oxygen. (iii) Catalytic enzyme Essential elements that activates or inhibit enzymes, i.e., `Mg^(2+)` acts as an activator for both ribulose biphosphate carboxylase oxygenase (Rubisco) and phosphoenol pyruvate carboxylase (PEP carboxylase). (iv) Balancing elements Elements counteract the toxic effect of other minerals by causing ionic balance (e.g., calcium, magnesium and potassium). (v) Influencing of the osmotic pressure of the cell Some essential elements alters the osmotic potential of the cell. Plant cells contain dissolved mineral elements in the cell sap influencing osmotic pressure of the cell, e.g., K is involved in opening and closing of stomata. |
|
| 188. |
Which is not a true statement regarding macronutrients?A. Macronutrients form plant structure.B. Macronutrients become toxic when present is excess.C. Macronutrients have no role in electron transfer.D. Macronutrients develop osmotic potential. |
| Answer» Correct Answer - B | |
| 189. |
Choose the false statement regarding micronutrients.A. Micronutrients become toxic in excess.B. Micronutrients do not cause osmotic potential.C. Micronutrients have little role in protoplasmic structureD. Micronutrients play a secondary role in enzyme activation. |
| Answer» Correct Answer - D | |
| 190. |
Nitrite is oxidised to nitrate with the help ofA. nitrosomonasB. nitrococcusC. nitrobacterD. Thiobacillus |
|
Answer» Correct Answer - C Nitrite is oxidised to nitrate with the help of the bacterium nitrobacter. |
|
| 191. |
About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen andA. Calcium and phosphorousB. Phosphorus and sulphurC. Sulphur and magnesiumD. Magnesium and sodium |
| Answer» Correct Answer - A | |
| 192. |
The concentration of elements such as carbon and nitrogen in plants isA. Above 10 millimole `kg^(-1)` of dry matterB. Less than 10 millimole ` kg ^(-1) ` of dry matterC. Equal to 10 millimole ` kg ^(-1) ` of dry matter.D. Between 1 - 10 millimole ` g ^(-1)` of dry matter. |
| Answer» Correct Answer - A | |
| 193. |
Which of the following is not essential for all plants ?A. MgB. CoC. MoD. Ni |
| Answer» Correct Answer - B | |
| 194. |
Which of the following is a micronutrient ?A. CaB. MgC. KD. Ni |
| Answer» Correct Answer - D | |
| 195. |
A macronutrient isA. ManganeseB. ZincC. IronD. Magnesium |
| Answer» Correct Answer - D | |
| 196. |
Select the odd one out from the following w.r.t macronutrient.A. NitrogenB. PhosphorusC. IronD. Sulphur |
| Answer» Correct Answer - C | |
| 197. |
A macronutrient which is component of all organic compounds but is not obtained from soil isA. NB. PC. MgD. C |
| Answer» Correct Answer - 4 | |
| 198. |
Macronutrients are elements thatA. play major role in plant nutritionB. are required in large quantities in plantsC. form large molecules in plantsD. none of the above |
| Answer» Correct Answer - B | |
| 199. |
Photosynthetic food material is transported in the form ofA. GlucoseB. SucroseC. StarchD. Fructose |
| Answer» Correct Answer - B | |
| 200. |
Which is essential for the growth of root tip?A. ZnB. FeC. CaD. Mn |
| Answer» Correct Answer - 3 | |