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.
| 301. |
By the reaction of `alpha`-ketoglutaric acid with ammonia, through which of the process glutmaic acid is formedA. oxidative aminationB. reductive aminationC. ammonificationD. transamination |
| Answer» Correct Answer - 2 | |
| 302. |
Which enzyme converts atmospheric nitrogen into ammonia ? |
| Answer» Correct Answer - Nitrogenase | |
| 303. |
Nitrogen and hydrogen combine to form ammonia under high temperature and pressure conditions this is an example ofA. biological `N_(2)` fixationB. natural `N_(2)` fixationC. industrial `N_(2)` fixationD. electrical `N_(2)` fixation |
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Answer» Correct Answer - C In industrial or abiological nitrogen fixation, ammonia is produced industrially by direct combination of nitrogen with hydrogen (obtained from water) at high temperature and pressure. It is then changed into various types of fertilisers including urea. |
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| 304. |
Certain bacteria living in the soil poor in oxygen convert nitrates into nitrites and then to free nitrogen and such bacteria are termed as Or The bacteria which convert `NO_(3) rarr` Free `N_(2)` are called asA. nitrogen fixing bacteriaB. denitrifying bacteriaC. ammonifying bacteriaD. saprophytic bacteria. |
| Answer» Correct Answer - 2 | |
| 305. |
Decomposition of organic nitrogen of dead plants and animals into ammonia is called.______A. nitrificationB. nitrate reductionC. `N_(2)` fixationD. ammonification |
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Answer» Correct Answer - D Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification some of this ammonia produced volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria. |
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| 306. |
Decomposition of organic nitrogen of dead plant and animals into ammonia is called :A. AmmonificationB. `N_2 ` fixationC. Nitrate assimilationD. Denitrification |
| Answer» Correct Answer - A | |
| 307. |
Which element is essential as electron carrier?A. PotassiumB. IronC. ZincD. Calcium |
| Answer» Correct Answer - 2 | |
| 308. |
Carrier proteins are involved inA. Active transport of ionsB. Passive transport of ionsC. Water transportD. Water evaporation |
| Answer» The carriers proteins usually transport solutes against their electrochemical gradient. Energy for transport is provided by ATP, electron transport chain and light. | |
| 309. |
Movement of electrolytes through the roots is generallyA. Against electrochemical gradient and require energyB. Along electro chemical gradient and does not require energyC. A passive processD. Dependent on aquaporins |
| Answer» Correct Answer - A | |
| 310. |
Movement of electrolytes through the roots is generallyA. Against the electrochemical gradient and requires energy.B. Along the electrochemical gradient and does not require energyC. A passive processD. Dependent on aquaporins |
| Answer» Correct Answer - A | |
| 311. |
Which of the following is not a trace element?A. ZnB. MnC. MgD. Cu |
| Answer» Correct Answer - C | |
| 312. |
Mineral salts which are absorbed by the roots from the soil, are in the from ofA. Very dilute solutionB. Dilute solutionC. Concentrated solutionD. Very concentrated solution |
| Answer» Correct Answer - A | |
| 313. |
A characteristic of ion channels is/areA. They are transmembrane proteins functioning as selective poresB. They were discovered by Neher and SakmanC. They are gated channelsD. All of these |
| Answer» Correct Answer - D | |
| 314. |
Plants absorb mineral salts from the soil solution throughA. A semipermeable membrane into the cytoplasmB. Perforation at the apex of root hair cellsC. The cell wall which is semipermeableD. None of these |
| Answer» The semipermeable membrane is responsible for absorption of minerals salts. | |
| 315. |
Symbiotic microorgainsm isA. ClostridiumB. AzotobacterC. RhizobiumD. Chromatium |
| Answer» Correct Answer - C | |
| 316. |
Minerals are absorbed in the form ofA. MoleculesB. ionsC. compoundsD. mixtures |
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Answer» Correct Answer - B Mineral salts present in the soil solution are absorbed in the form of ions (cations and anions). |
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| 317. |
Food in plants is translocated in the form ofA. GlucoseB. StarchC. SucroseD. Fructose |
| Answer» Correct Answer - C | |
| 318. |
The theory of Donnan eqilibrium explains the presence of someA. Fixed diffusible cations on the inner sideB. Fixed non-diffusible anions on the inner sideC. Non-fixed diffusible anions on the inner sideD. Non-fixed diffusible cations on the inner side |
| Answer» Correct Answer - B | |
| 319. |
Active absorption of mineral salts makes use ofA. ionic exchangeB. carriersC. phosphorylation of elementsD. none of these |
| Answer» Correct Answer - B | |
| 320. |
Active transport of ions by the cell requiresA. high temperatureB. ATPC. alkaline pHD. salts |
| Answer» Correct Answer - 2 | |
| 321. |
Insectivorous/carnivorous plants live in medium that are defidient in nitrogen. Select a pair of insectivorous plantsA. Drosera and RafflesiaB. Nepenthes and UtriculariaC. Dionaea and ViscumD. Venus fly trap and Rafflesia. |
| Answer» Correct Answer - 2 | |
| 322. |
On which surface of cell Donnan equilibrium occur " " Or Demosome is a modification ofA. Cell wallsB. Plasma membraneC. TransportD. Nuclear membrane |
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Answer» Correct Answer - B Dorman equilibrium occurs at the plasma membrane. It takees into account the transport of non-diffusible ions. |
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| 323. |
According to the well known theory of transport of solutes across a cell membrane, what happens when sugan is passed through itA. `Na^(+)` flows in the direction of the sugarB. `Na^(+)` flows independent of sugar moleculesC. `NA^(+)` flows against the sugar moleculesD. `Na^(+)` ions do not flow at all |
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Answer» Correct Answer - 3 |
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| 324. |
The given figure indicates the development of root nodule in soyabean Identify A, B, C and D respectivelyA. A- Nitrosomonas bacteria, B- Cortex cell, C - Inner cortex, D - Infection threadB. A - Rhizobial bacteria, B - Endodermal cell , C - Inner Endodermis, D- Infection threadC. A - Rhizobial bacteria, B - Cortex cell, C- Inner cortex, D - Infection threadD. A - Rhizobial bacteria, B - Cortex cell, C - Outer cortex, D - Infection thread |
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Answer» Correct Answer - c |
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| 325. |
Consider the following enzymes 1. Glutamate dehydrogenase 2. Glutamine synthetase 3. Glutamate synthase Which of these are concerned with ammonia assimilation?A. 1 and 2B. 2 and 3C. 1 and 3D. 1, 2 and 3 |
| Answer» Correct Answer - 4 | |
| 326. |
What do you mean by hydroporics ? |
| Answer» The soil - less growth of plants in a nutrient solution is called hydroponics. | |
| 327. |
What are macronutrients ? |
| Answer» Nutrients which are required in large quantity by the plants are called macronutrients. | |
| 328. |
What is the concentration of macronutrients found in plants ? |
| Answer» Exess of 10 mmole ` kg^(-1)` of dry matter. | |
| 329. |
Name the elements which form components of biomolecules. |
| Answer» Correct Answer - C, H, O and N. | |
| 330. |
The given experimental set-up is usedA. to show that `CO_(2)` is required during photosynthesisB. to show that `O_(2)` is evolved during photosynthesisC. for nutrients solution cultureD. to measure growth of a plant |
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Answer» Correct Answer - C the given experimental set-up shows nutrient solution culture. in this typical solution culture technique, nutrient solution is placed in superior glass jars or polythene bottles covered with black paper (to prevent growth of algae and reaction of roots to sunlight). the jars contain split covers or corks with holes for suspending seedling, a funnel for adding solution and a bent tube for aeration, as shown in the given figure, regular aeration is required for proper growth and activities of roots. |
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| 331. |
Refer to the given figure and select the incorrect option regarding itA. it shows hydroponic plant productionB. plants are grown in a tube or though placed on a slight inclineC. The solution flows down the tube and returns to the reservoir due to the suction pressure created by pumpD. the roots in this set-up, are continously bathed in aerated nutrients solution. |
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Answer» Correct Answer - C The solution flows down the tube and returns to the resevoir due to the gravity as the tube is placed on a slight incline. |
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| 332. |
More than ___elements of the ___discovered so far are found in different plants.A. 60105B. 105,60C. 30,60D. 4105 |
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Answer» Correct Answer - A Out of 105 or more element discovered so far 60 elements are found in different plants, out of 105, only 20 elements have been found to be essential for growth and development of the plants. |
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| 333. |
Minerals which maintain cation-anion balance in cells areA. Cl and KB. K and FeC. MethionineD. both b and c |
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Answer» Correct Answer - A `Cl^(-)` with `Na^(+)` and `K^(+)` helps in determining solute concentration and anion-cation balance in cells. |
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| 334. |
Name two amino acids which contain sulphur. |
| Answer» Cysteine and Methionine | |
| 335. |
How is sulphur important for plants ? Name the amino acids in which it is present. |
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Answer» Sulphur (S) us an important macronutrient in plants that is absorbed by the plants as `SO_(4)^(2-)` ion . It mainly functions as a components of vitamins (biotin, thiamine), proteins, coenzyme-A, amino acid (cystein and methionine) etc. It is also an essential component of ally sulphide (onion, garlic)and sinigrin (mustard). Deficiency of sulphur can lead to chlorosis in young leaves, extensive root growth, formation of hard and woody stem. It also causes the reduction in juice content of citrus fruit and tea yellow disease of tea. Sulphur is found in amino acids systeine, methionione, etc. |
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| 336. |
The inorganic essential elements which are obtained from the soil are called asA. mineral elementsB. non-mineral elementsC. non-essential elementsD. both b and c |
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Answer» Correct Answer - A Essential elements derived from soil are termed as mineral elements E.g. , P,K,S,Mg,Ca,Fe,Zn,Mn,B,Cu,Mo,Cl and N. Essential elemen ts got from air or water are known as non-mineral elements E.G., C,H,O in aquatic habitats as well as in soil solution, mineral elements occur dissolved in water. Nitrogen is included in both mnineral and non-mineral elements. |
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| 337. |
An immobile element present in plant tissue isA. NB. PC. CaD. K |
| Answer» Correct Answer - C | |
| 338. |
A sulphur containing amino acid isA. methionineB. asparagineC. serineD. proline |
| Answer» Correct Answer - 1 | |
| 339. |
Component of nitrogenase and nitrate reduction isA. MoB. MnC. CoD. N |
| Answer» Correct Answer - A | |
| 340. |
Calcium is mainly a component ofA. primary wallsB. secondary wallC. chlorophyllD. middle lamella |
| Answer» Correct Answer - 4 | |
| 341. |
The macronutrient______is a component of all organic compounds but is not obtained from soil.A. Carbon, nitrogenB. hydrogenC. oxygenD. nitrogen |
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Answer» Correct Answer - A Carbon is a macronutrient, and is a major component of all organic compounds but is not obtained from soil Carbon is derived from atmosphere as carbon dioxide `(CO_(2))`. |
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| 342. |
Micronutrients are present in plant tissues in concentrations less than ____of dry matter.A. 1 m mole `Kg^(-1)`B. 10 m mole `Kg^(-1)`C. 0.1 m mole `Kg^(-1)`D. 2 m mole `Kg^(-1)` |
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Answer» Correct Answer - B Microelements (micronutrients) are those essential elements which are required by plants in small amounts, equal of less than 10 mmole `Kg^(-1)` of dro matter. Microelements are mostly involved in the functioning of enzymes, as cofactors or metal activators. They are eight in number- Fe, Zn, Mn, B, Cu Mo, Cl and Ni. |
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| 343. |
Tryptophan synthesis, carboxylase activity and little lea of plants are all associated withA. ZnB. BC. CaD. Cu |
| Answer» Correct Answer - A | |
| 344. |
Huner signs in plants areA. Symptoms due to lesser water absorption in plantsB. Symptoms due to poor photosynthesis in plantsC. Deficiency symptoms of mineral nutrientsD. Symptoms due to excess water absorption in plants. |
| Answer» Correct Answer - C | |
| 345. |
Mineral which is part of CoA, Fd, thiamine and lipoic acid is :A. MnB. FeC. SD. Ca |
| Answer» Correct Answer - C | |
| 346. |
Mineral which is part of CoA, Fd, thiamine and lipoic acid is :A. MnB. FeC. SD. Ca |
| Answer» Correct Answer - C | |
| 347. |
Deficiency of iorn causesA. Bending of leaf tipB. Interveinal chlorosis first on young leavesC. Decreases of protein synthesisD. Reduced leaves and stunted growth |
| Answer» Iron deficient plants develop pronounced interveinal chlorosis similar to that caused y Mg deficiency. Whereas in iron chlorosis the young leaves may become yellow or white with prominent green veins. | |
| 348. |
Gray speck disease in oats takes place by the distance deficiency ofA. ZincB. CopperC. PotassiumD. Manganese |
| Answer» "Grey speck disease" in oat appears due to the deficiency of maganese, which leads to total failure of crop. | |
| 349. |
The element arsenic, copper and murcury have which of the following effectA. Catalytic effectB. pH effectC. Toxic effectD. Antagonastic action |
| Answer» Many elements become toxic in higher concentration than the normal e.g., Cu. Others are toxic even in smaller concentration e.g., Hg. | |
| 350. |
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented byA. CytochromeB. LeghaemoglobinC. XanthophyllD. Carotene |
| Answer» Correct Answer - B | |