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.
| 551. |
Who reported the appearance of symptoms of the Bakane disease in uninfected rice seedlings when they were treated with sterile filtrates of the fungus? A. Skoog and MillerB. E. KurosawaC. Cousins D. F. W. Went |
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Answer» Correct Answer - B E.Kurosawa reported the appearance of symptoms of the Bakane disease in uninfected rice seedlings when they were treated with sterile filtrates of the fungus. |
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| 552. |
Auxin was isolated by (A)_____ from tips of coleoptiles of oat seedlings |
| Answer» Correct Answer - A-F.W. Went | |
| 553. |
Increase in the girth of plant is known as/done byA. Primary growthB. Apical meristemC. Intercalary meristemD. Secondary growth |
| Answer» Correct Answer - D | |
| 554. |
The preence of auxins in a solution could be tested byA. Avena sativa stem tip testB. Carbon tetrachloride testC. Iodine testD. Defoliation test |
| Answer» Correct Answer - A | |
| 555. |
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows A. Green plants seek light because they are phototropicB. Light stimulates plant cells on the light- ed side to grow fasterC. Auxin accumulates on the shaded side, stimulating greater cell elongation thereD. Green plants need light to perform pho- tosynthesis |
| Answer» Correct Answer - C | |
| 556. |
Assertion: Cytokinins are anti-ageing hormones. Reason: They cause changes in osmotic potential by increasing the volume of mature cells. |
| Answer» Correct Answer - C | |
| 557. |
Flowering dependent on cold treatment isA. cryotheraryB. cryogenicsC. cryoscopyD. vernalisation |
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Answer» Correct Answer - D Vemalisation is a process of shortening of juvenile or vegetative phase and hastening flowering by a previous cold treatment |
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| 558. |
Assertion: Cytokinins are anti-ageing hormones. Reason: They cause changes in osmotic potential by increasing the volume of mature cells.A. If Both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion and reason are true but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true statement but reason is false, then mark (3)D. If both Assertion and reason are false statements, then mark (4). |
| Answer» Correct Answer - B | |
| 559. |
Who observed that the coleoptiles of canary grass responded to unilateral illumination by growing towards the light (phototropism)? A. F.W. Went B. B. Kurosawa C. Skoog and Miller D. Charles Darwin and his son Francis Darwin |
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Answer» Correct Answer - D Charles Darwin and his son Francis Darwin observed |
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| 560. |
Clinostat is employed in the study ofA. osmosisB. growth movementsC. photosynthesisD. respiration |
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Answer» Correct Answer - B Clinostat/klinostat is an instrument which can nullify the effect of gravity and allow a plant to grow horizontaliy by slowly rotatmg it. Rotating clinostat do not show any bending because the gravitation stimulus in th.is case is not unilateral as it affects all the sides of the rotating organs equally, whereas plant kept in unrotated/fixed clinostat bends downwards showing positiwi geotropism |
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| 561. |
Classical experiments on growth were performed byA. Lamarck and Boysen -JennenB. Boysen -Jennsen and darwinC. Darwin and lamarckD. De veries and pual |
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Answer» Correct Answer - b (b) The existance of first plant growth hormone came from the work of Darwin and Darwin. They found that bending movement of coleoptile of canary grass was due to exposure of tip of unilateral light. Boysen - Jenson found that the tip produces a chemical which was later named auxin. |
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| 562. |
Some early experiments on phototropic curvature in grasses led to discovery ofA. Auxins B. Gibberellins C. Cytokinins D. None of the above |
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Answer» Correct Answer - A Some early experiments on phototropic curvature in grasses led to discovery of auxins |
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| 563. |
Foolish Seedling disease of rice led to the discovery ofA. 2, 4-DB. IAAC. GAD. ABA |
| Answer» Correct Answer - C | |
| 564. |
The bakane (foolish seedling), a disease of rice seedlings was caused by a fungal pathogen____ |
| Answer» Correct Answer - Gibberalla fujikuroi | |
| 565. |
Auxanometer is used to measure plant organA. the growth in length of a plant organB. the growth in breadth of a plant organC. population of the pests attacking a plantD. all of the above |
| Answer» Correct Answer - A | |
| 566. |
Auxanometer is used to measure plant organA. LengthB. WidthC. DepthD. Growth |
| Answer» Correct Answer - D | |
| 567. |
name the meristems which appear later in life of dicotyledonous and gymnosperms plants and causes increase in the girth of the organ in which they are active. |
| Answer» Correct Answer - Lateral meristems (Vascular combium and cork cambium). | |
| 568. |
An irreversible or permanent increase in size, mass or volume of a cell, organ or organism is called as ________. |
| Answer» Correct Answer - Growth | |
| 569. |
In short-day plants, flowering is induced byA. photoperiod less than 12 hrsB. photoperiod below a critical length and uninterrupted long nightC. long nightD. short photoperiod and interrupted long night |
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Answer» Correct Answer - B In short-day plants, flowering is induced when the day length do not exceed a certain critical value, the day length required is less than a certain cntical length. Short-day plants may t e more correctly called long night plants as a certain minimum of uninterrupted dark period in 24 hrs is necessary for their flowering. Short-day plants will not flower if the dark period is less than a critical length |
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| 570. |
Auxanometer is used to measure plant organA. RespirationB. TranspirationC. Plant movementD. Growth |
| Answer» Correct Answer - D | |
| 571. |
CytokininsA. promote abscissionB. influence water movementC. help retain chlorophyllD. inhibit protoplasmic streaming |
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Answer» Correct Answer - C Cytokinin retards the process of chlorophyll degradation. Leaf discs are taken in two lots. In one lot cytokinin is provided. After 48- 72 hrs the leaf discs are compared for chlorophyll content. The leaf disc of cytokmin containing lot has high chlorophyll content. |
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| 572. |
Which of the following is a correct statement regarding the plant growth ?A. Growth does not involve increase in number of partsB. Growth occurs during definite periodsC. Well defined growing regions are ab- sentD. It is generally indeterminate |
| Answer» Correct Answer - D | |
| 573. |
Assertion: Phytochrome, a protein, has regulatory functions. Reason: Various morphogenetic processes are regulated by it. |
| Answer» Correct Answer - A | |
| 574. |
One of the synthetic auxin isA. NAAB. IAAC. GAD. IBA |
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Answer» Correct Answer - A NAA (Naphthalene Acetic Acid) and 2,4-D (2.4-dichlorophenoxy acetic acid) are synthetic auxins. The term auxin is applied to the indole-3-acetic acid (IAA) and to other natural and synthetic compounds having certain growth-regulating properties. IAA and IBA (Indole Butyric Acid) have been isolated from plants. All these auxins have been used extensively in agricultural and horticultural practices. |
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| 575. |
Who performed the experiments using canary grass to demonstrate the curvature of tip?A. E.kurosawaB. F.skoogC. WentD. Darwin |
| Answer» Correct Answer - D | |
| 576. |
Dr. F. Went noted that is coleoptile tips were removed and placed on agar for one hour , the agar would produce a bending when placed on one side of freshly cut coleoptile stumps .Of what sighifcance is this exerimentA. It demonstrated polar movement of auxins. B. It made possible the isolation and exact identification of auxin. C. It is the basis for quantitative determination of small amounts of growth~promoting substances. D. It supports the hypothesis that 1AA is auxin. |
| Answer» Correct Answer - B | |
| 577. |
During differentiation of xylemA. End walls are lost in tracheidsB. Loss of protoplasm occurs in vesselsC. Lignified thikening develop in tracheary elementsD. More than one option is correct |
| Answer» Correct Answer - D | |
| 578. |
If an etiolated stem could be first saturated with auxin by spraying and then exposed to a streak of light from one side it willA. Bend towards the lightB. Bend away from lightC. Grow straight upwardsD. Be prevented from growing |
| Answer» Correct Answer - A | |
| 579. |
Auxin originates aat the tip of the stem and controls growth elsewheree .The movement of auxin is largelyA. BasipetelB. AcropetalC. Acropetal and basipetalD. Centropetal |
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Answer» Correct Answer - a (a) Auxin show polar movement .It is basipetal (from apex to bease ) instem but acrpotel (from tip towards short ) in the root. |
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| 580. |
If an etiolated stem could be first saturated with auxin by spraying and then exposed to a streak of light from one side it willA. Bend toward the lightB. Bend away from the lightC. Grow straight upwardD. Be prevented from growing |
| Answer» Correct Answer - A | |
| 581. |
Find the correct statements 1. Causal organism of foolish seedling disease is source of gibberellin 2. Ascorbic acid is growth promoter 3. Ratio of auxin to cytokinin controls differentiation 4. Bolting of cabbage can be induced by treatment with IAAA. 1, 2, 3 correctB. l, 2 correct C. 2, 4 correctD. 1, 3 correct |
| Answer» Correct Answer - D | |
| 582. |
Which is employed for artificial ripening of banana fruits?A. AuxinB. CumarinC. EthyleneD. Cytokinin |
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Answer» Correct Answer - C Ethylene is a gaseous hormone that induces ripening and maturity of fruits. When applied as foliar spray ethylene accelerates matmity and induces uniform ripening in banana, pineapple, fig, etc. It also induces fruiting in ornamental plants and causes preharvest defoliation in nursery stock |
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| 583. |
Assertion : Ethylene is a gaseous phytohormone Reason :It promotes ripening of many fruitsA. If both Assetion and Reason are true and the Reason is a correct explanation of the AssertionB. If both Assertion and Reason are true but Reason is not a correct explanation of the AssertionC. If Assertion is true but the Reason is falseD. If both Assertion and Reaon are false |
| Answer» Correct Answer - B | |
| 584. |
Who first suggested presence of growth regulatory chemicals in plants ?A. DarwinB. WentC. SachsD. Paal |
| Answer» Correct Answer - A | |
| 585. |
Growth of an organ is defined asA. Infinite increase in sizeB. Irreversible increase in sizeC. Reversible increase in sizeD. Infinite and reversible increase in size |
| Answer» Correct Answer - B | |
| 586. |
Dormancy in seeds may be due to presence of certain chemicals likeA. Phenolic acidB. ZeatinC. NAAD. Amylase |
| Answer» Correct Answer - A | |
| 587. |
Mark the odd one (w.r.t. synthetic auxin)A. IAAB. NAAC. 2, 4-DD. 2, 4, 5-T |
| Answer» Correct Answer - A | |
| 588. |
Who first suggested presence of growth regulatory chemicals in plants ?A. Went B. Sachs C. Darwin D. Cousins |
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Answer» Correct Answer - A Went first suggested presence of growth regulatory chemicals in plants |
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| 589. |
Seedless fruits can be induced byA. ABA and IAAB. ABA and ZeatinC. IAA and `GA_(3)`D. Ethylene and ABA |
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Answer» Correct Answer - C |
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| 590. |
Which of the following is not a physiological effect/ an influence of auxinA. Promotes boltingB. Prevents early fruit and leaf drop C. Promotes howering D. Initiates rooting in stem cuttings |
| Answer» Correct Answer - A | |
| 591. |
See the following Bove structure is of an auxin , that isA. IAAB. Auxin bC. Auxin aD. None of the above |
| Answer» Correct Answer - a | |
| 592. |
Auxin originates aat the tip of the stem and controls growth elsewheree .The movement of auxin is largelyA. AcropetalB. BasipetalC. LateralD. Centripetal |
| Answer» Correct Answer - B | |
| 593. |
Assertion: Ethylene cause climacteric ripening of fruits. Reason : Climacteric fruits show a rise in respiration at the time of ripening.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.B. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If the assertion and reason is false but reason is true |
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Answer» Correct Answer - B (b) In most fruits the rate of respiration will undergo a sharp rise and then fall near the end of ripening. The climacteric acts as a triggerr that sets inm progress those change that rapidly transform the furit from an umripe to a ripe condition. Finally, application of ethylene ton unripe furit will bring on a premature climacteric and accelerate ripening. |
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| 594. |
Which of the following structures show unlimited growth in plants ?A. LeavesB. FlowerC. FruitsD. Roots |
| Answer» Correct Answer - D | |
| 595. |
Seed domarncy can be broken by the following combination of chemicalsA. `GA_(3)`,IAA and ABAB. `KNO_(3), GA_(3)` and Ethylene chlorohydrinC. NAA, 2, 4,5-T and IAAD. ABA , BAP and `GA_(3)` |
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Answer» Correct Answer - B |
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| 596. |
2, 4-D is a syntheticA. AuxinB. GibberellinC. CytokininD. Florigen |
| Answer» Correct Answer - A | |
| 597. |
The formula of Auxin-A isA. `C_(18) H_(30) O_(7)`B. `C_(18) H_(32) O_(5)`C. `C_(12) H_(30) O_(6)`D. `C_(20) H_(30) N_(5)` |
| Answer» Correct Answer - B | |
| 598. |
Assertion: Plant growth is unique because plants retain the capacity for unlimited growth throughout their life. Reason: Plants have different type of meristems at certain locations in their body that have capacity to divide and self-perpetuate.A. If both assertion and reason are true and the reason is the correct explanation of the assertion. B. If both assertion and reason are true but reason is not the correct explanation of the assertion. C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - A Plant growth is unique because plants retain the capacity for unlimited growth throughout their life as plants have different type of meristems at certain lo cations in their body that have capacity to divide and self-perpetuate |
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| 599. |
Match the following (column-I with column-II) A. a(iv), b(ii), c(iii), d(i)B. a(ii), b(iii), c(i), d(iv)C. a(i), b(iii), c(ii), d(iv)D. a(iii), b(iv), c(i), d(ii) |
| Answer» Correct Answer - D | |
| 600. |
Growth hormone reponsible for apical dominance isA. AuxinB. CytokininC. GibberellinD. Ethylene |
| Answer» Correct Answer - A | |