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. |
Movement of Sunflower towards the direction of Sun inA. Photonasty B. Phototropism C. Nyctinasty D. Seismonasty |
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Answer» Correct Answer - B Movement of Sunflower towards the direction of sun is phototropism |
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| 302. |
Size of grapes increases in application ofA. Gibberellin B. Auxm C. Cytokinin D. All of the above Cytokinins . |
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Answer» Correct Answer - A Size of grapes increases in application of gibberellin. |
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| 303. |
Guttman (1957 found a quick increadae in the amount of RNA in the nuclei on onion root afterA. Auxins treamentB. Kinetin treatementC. Giberellin treatmentD. All the above |
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Answer» Correct Answer - b Cytokinin promotes RNA synthesis is nuclei after treatment |
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| 304. |
Internodal elongation is stimulated byA. Auxin B. Phenol C. CytokininD. Gibberellin |
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Answer» Correct Answer - D Internodal elongation is stimulated by dibberllin. |
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| 305. |
Which of the following is indispensable in all cultureA. GibberellinB. KinetinC. EthyleneD. Auxin |
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Answer» Correct Answer - b Kinetin induces cell division. |
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| 306. |
Substances which originate at the tip of the stem and controal groq=wth elsewhere areA. Food materialB. Auxins or hormonesC. VitaminsD. Enzymes |
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Answer» Correct Answer - b (b) Hormones are secreted by cells in one part of the plant and produce their effect in other part of the plant . |
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| 307. |
Common inhibitor of germination isA. GA B. ABA C. Pantothenic acid D. Tartaric |
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Answer» Correct Answer - B Common inhibortor of germination is ABA. |
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| 308. |
Which one prevents premature fall of fruit ?A. `GA_3`B. NAAC. EthyleneD. Zeatin |
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Answer» Correct Answer - B NAA (Naphthalene Acetic Acid) is a synthetic auxin hormone which is useful for preventing pre-harvest fruit drop of tomatoes |
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| 309. |
Which hormone cuuses stunted growth in peaA. Gibberellic acidB. AuxinC. CytokininD. Ethylene |
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Answer» Correct Answer - d (d) As ethylene inhibits longitudanal growth but stimulates transverse growth |
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| 310. |
Which one prevents premature fall of fruit ?A. NAA B. Ethylene C. `GA_(3)`D. Zeatin |
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Answer» Correct Answer - A NAA(auxins) prevents premature fall of fruit. |
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| 311. |
Absciacid contorolsA. Shoot elogationB. Cell elongation and cell wall formationC. Cell divisionD. Leaf fall and dormancy |
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Answer» Correct Answer - d (d) Spray of abasics acid causes very fast abscission of leaves, and also causes dormancy of buds and seeds. |
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| 312. |
If the apical bud has been removed then we observe:A. More lateral branchesB. More adventitious budsC. Plant growth stopsD. Flowering stops |
| Answer» Correct Answer - A | |
| 313. |
Anthesis is a phenomenon which refers to:A. reception of pollen by stigmaB. formation of pollenC. development of antherD. opening of flower bud |
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Answer» Correct Answer - D Anthesis is the opening of floral buds. Reception of pollen by stigma is called pollination. Formation of pollen is called microsporogenesis |
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| 314. |
Growth in internodal regions of green plants is due toA. indole acetic acidB. cytokininsC. gibberellinsD. ethylene |
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Answer» Correct Answer - C Gibberellin `(GA_3)` promotes internodal elongation in a wide range of species. This intemodal elongation phenomenon is known as bolting Gibberellin is a plant growth hormone which was first time obtained from a fungus Gibberella fujikuroi (Fusarium moniliformi) |
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| 315. |
Treatment of seed at low temperature under moist conditions to break its dormancy is calledA. ScarificationB. Pressure chamber methodC. StratificationD. Impaction |
| Answer» Correct Answer - C | |
| 316. |
Treatment of seed at low temperature under moist conditions to break its dormancy is calledA. ChelationB. StratificationC. scarificationD. Vernalization |
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Answer» Correct Answer - b (b) In startifaction apple, Plum seeds, are exposed in well areated , moist condition under low temperature of `0-10^(@)`C for weeks of months. |
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| 317. |
Vernalisation can often be replaced byA. auxinB. cytokininsC. gibberellinsD. ethylene |
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Answer» Correct Answer - C Vernalisation or low temperature treatement of some plants can be replaced by gibberellins. |
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| 318. |
All cells of a plant are descendents of theA. ZygoteB. Apical meristemC. Lateral meristemD. Both B and C |
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Answer» Correct Answer - A All cells of a plact are descendents of the zygote. |
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| 319. |
Storage sprouting of potato can be prevented byA. IAAB. Maleic hydrazideC. CytokininsD. Gibberellins |
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Answer» Correct Answer - B (b) Maleic hydraide : It is a growth retardant which checks cell division. So during seed storage this is applied for checking sprouting of potato tubers so that the important of potato may not be lowered down. |
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| 320. |
Sprouting of potato can be prevented in storage byA. `CH_(4)`B. `GA_(3)`C. MHD. CK |
| Answer» Correct Answer - B | |
| 321. |
What is effect of ethylene on storage organs such as rhizomes, tubers? |
| Answer» It cause sprouting of these organs. | |
| 322. |
What is the full form of ABA? |
| Answer» Abscisic acid (ABA). | |
| 323. |
What happens to the leaves if concentration of ABA increases? |
| Answer» This results in the senescence of leaves. | |
| 324. |
Which hormone induces dormancy of buds and seeds? |
| Answer» Correct Answer - ABA | |
| 325. |
Which plant hormone induces the phenomenon of photoropism in plants?A. AuxinsB. EthyleneC. CytokininD. Gibberellin |
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Answer» Correct Answer - A Auxins play a very important role in certain tropic movements shown by plants, e.g., phototropism in shoots and geotropism in roots. |
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| 326. |
How will you prevent the premature ripening of fruits ? |
| Answer» Ripening of fruits is brought about by the action of ethylene. Since the ethylene is a gas, ripening process can be delayed be removing the ethylene by a continuous flow of air | |
| 327. |
Cinostat is the apparatus used toA. Measures the rate of growth in plantB. Measures the quantity of auxin in plantC. Measures the effect of light on plantD. Elimanate the effect of gravity on plant |
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Answer» Correct Answer - d (d) Clinostat (= klinostat) is an instrument which can eleminate the effect of gravity and allow a plant to grow horizontally by slowely rotating it |
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| 328. |
A long day plant isA. Wheat/SpinachB. Soyabean C. Tobacco D. Xanthium |
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Answer» Correct Answer - D Wheat and spinach are long day plant. |
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| 329. |
Which increases in the absence of light?A. Uptake of mineralsB. Uptake of waterC. Elongation of internodesD. Ascent of sap |
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Answer» Correct Answer - C In genereral intense light retards growth in plants. High lighL intensities induce dwarfening of the plant. Absence of light reduces the overall growth, photosynthesis, uptake of minerals and ascent of sap. However, the elongation of internodes is seen to occur in the absence of light. |
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| 330. |
Highest auxin concentration occursA. in growing tipsB. in leavesC. at base of plant organsD. in xylem and phloem |
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Answer» Correct Answer - A Boysen-Jensen (1913), Paal (1919) and Went (1928) reported that stern tip is the seat of growth regulatmg centre. Auxm shows polar transport from stem apex to base and from these to root apex. |
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| 331. |
Which of the following harmones can replace vernalization or Genetic dwarfness can be overcome by treating withA. AuxinB. CytokininC. GibberellinsD. Ethylene |
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Answer» Correct Answer - C Vemalisation refers to the application of low temperature to moistened seeds and young plants, causing shortening of vegetative phase and initation of reproductive phase. Chailakhyan (1968) reported that under long-day conditions vernalin hormone turn into gibberellin and thus, in some plants, the requirement for vernalisation is overcome by gibberellins |
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| 332. |
Leaf fall can be prvented byA. Abscisic acid B. Adenine C. Florigen D. Cytokinins |
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Answer» Correct Answer - D Leaf fall can be prevented with the help of cytokinins |
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| 333. |
Apical dominance meansA. Suppresion of growth of apical bud by axillary budsB. suppression of growth of axillary buds by presence of apical budC. Stimulation of growth of apical bud by removal of axillary budsD. Inhibition of growth of axillary buds by removal of apical bud |
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Answer» Correct Answer - b (b) The apex inhibits the growth of axillary bud is called apical dominance |
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| 334. |
Which of the following harmones can replace vernalization or Genetic dwarfness can be overcome by treating withA. AuxinB. EthyleneC. GibberellinsD. Cytokinins |
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Answer» Correct Answer - c (c ) The stimulas of vernalization in known as vernalin. The stimulas of vernalixation that inducing flowering could be a particular gibberelin or a mixtures of gibberlins. If FGA is sprayed on the single gene dwarf plants, genetic dwarfism is overcome and plants become long e.g., maize, pea, etc. |
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| 335. |
Phytohormones resposible for cell division in callus are ____ and _____.A. ABA and cytokininB. Gibberellin and ethyleneC. Auxin and cytokininD. Ethylene and cytokinin |
| Answer» Correct Answer - C | |
| 336. |
Which of the following type of phytohormones resemble the nucleic acids in some struc- tural aspectsA. CytokininsB. AuxinsC. GibberellinsD. Absasic acid |
| Answer» Correct Answer - A | |
| 337. |
Apical dominance is caused byA. AuxinsB. GibberellinsC. CytokininsD. Abscissic acid |
| Answer» Correct Answer - A | |
| 338. |
Plasticity in plant growth means thatA. Plant roots are extensibleB. Plant growth is dependant on the environmentC. Stems can extendD. None of these |
| Answer» Correct Answer - b | |
| 339. |
Plasticity in plant growth means thatA. plant roots are extensibleB. plant development is dependent on the environmentC. stems can extendD. none of the above |
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Answer» Correct Answer - b Different kinds of structures develop in plants in different phases of growth or in response to environment. This ability is called plasticity. |
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| 340. |
Plasticity in plant growth means thatA. plant roots are extensibleB. plant grow,th is dependent on the envi- ronmentC. stems can extendD. none of the above |
| Answer» Correct Answer - b | |
| 341. |
What is plasticity |
| Answer» It refers to the ability of plants to follow different pathways in response to environment or phase of life, to form different kind of structures. | |
| 342. |
To increase sugar production in sugarcane, they are sprayed withA. IAAB. CytokininC. GibberellinsD. Ethylene |
| Answer» Correct Answer - c | |
| 343. |
What does an overipe apple release which affects other apples in the basket ? |
| Answer» Correct Answer - Ethylene | |
| 344. |
Seed dormancy is caused byA. `C_(2)H_(4)`B. `ABA`C. I A AD. `GA_(3)` |
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Answer» Correct Answer - B Seed dormancy is mainly caused by ABA. Dormancy allows seeds to tolerate desiccation and extremes of temperature better. Due to its action of inducing dormancy in seeds, buds etc. ABA is also called as dormin. |
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| 345. |
A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulator can be applied to achieve this?A. ABAB. EthyleneC. GAD. Cytokinins |
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Answer» Correct Answer - B Ethylene has a feminising effect on sex expression. The genetically male plants of cucumber can be induced to produce female flowers in the presence of ethylene. The number of female flowers and hence fruit is enhanced in these plants. |
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| 346. |
A leaf of `20cm^(2)` growth `5cm^(2)` per hour and B leaf of `25cm^(2)` grows `5cm^(2)` per hour The relative growth rate of leaf A and B respectively isA. 25% and 20%B. 20% and 25%C. 50% and 100%D. 25% and 50% |
| Answer» Correct Answer - A | |
| 347. |
A primary root grows from 5 cm to 19 cm in a weak. Calculate the actual growth rate (AGR) and relative growth rate (RGR) over the period.A. `{:(AGR,RGR),(14cm,2.8):}`B. `{:(AGR,RGR),(14cm,3.8):}`C. `{:(AGR,RGR),(3.8cm,14):}`D. `{:(AGR,RGR),(24cm,2.8):}` |
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Answer» Correct Answer - A `AGR = 19 - 5 = 14 cm` `RGR = (14)/(5) = 2.8 cm` |
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| 348. |
Saccharum officinarum grows well inA. Low temperatureB. Swampy areaC. Dry and arid conditionD. Moist conjdition |
| Answer» Correct Answer - a | |
| 349. |
Write the mathmatical expression for geometrical growth. |
| Answer» Correct Answer - `W_(1)=W_(0)e^(n)` | |
| 350. |
Fill in the blanks Qualitative comparisons between the growth of the living system can be in two ways: (i) Measurement and the comparison of total growth per unit time is called the ..a…grwoth rate. (ii) The growth of the given system per unit time expressed on a common basis, eg. per unit iniitial parameter is called...b.... growth rateA. a-absolute,b-releativeB. a-relative,b-absoluteC. a-arithmetic,b-geometericD. a-geometric,b-arithmetic |
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Answer» Correct Answer - A Quantitative comparisons between the growth of theliving system can be made in two ways: (i) Measurement and the comparison of total growth per unit time is called the absolute growth rate. (ii) The growth of the given system per unit time ex pressed on a common basis, e.g., per unit initial parameter is called relative growth rate |
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