WORKSHEET-8 BIOLOGY (PLANT GROWTH &

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Ambrose Wilkerson
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DATE : / / 2018. TOTAL MARKS: 304 M DURATION: 6 HR General Instruction: - All questions are compulsory. The question paper consists of 88 questions divided into five sections.

1 DATE : / / TOTAL MARKS: 304 M DURATION: 6 HR General Instruction: - All questions are compulsory. The question paper consists of 88 questions divided into five sections. Section -I comprises of 60 MCQ S single choice question of 4 mark each for each correct response & -1 for each wrong response. Section - II comprises of 10 very short answer type questions of 1 mark each. Section -III comprises of 8 short answer type questions of 2 mark each. Section -IV comprises of 6 brief answer type questions of 3 mark each. Section V- comprises of 4 long answer type question of 5 marks each. Use of Calculators is not permitted. NAME OF THE STUDENT BATCH SUBJECT GRADES BY FACULTY - AVERAGE GOOD EXCELLENT STUDENT SIGNATURE PARENT SIGNATURE FACULTY SIGNATURE

2 TYPE-1 MCQ S SINGLE CHOICE [60 4 = 240M ] 1. Maximum growth in roots occurs (a) At apex (b) In presence of light (c) Behind the apex (d) In presence of soil 2. Auxanometer is meant for (a) Respiratory activity (c) Growth activity 3. What is the role of light in plants (a) It is necessary for photosynthesis (b) It controls growth and movement (c) It controls the distribution of hormones (d) All the above (b) Photosynthetic activity (d) The amount of auxins 4. Which two factors primarily affect the developmental phase of growth of plants (a) Light and temperature (b) Rainfall and temperature (c) Light and wind (d) Temperature and relative humidity 5. Evergreen trees remain green throughout the year on account of (a) Absence of leaf fall (b) Leaves falling in small numbers at intervals (c) Supply of the moisture throughout the year (d) Cold climate 6. Phytotron is a device by which (a) Electrons are bombarded (b) Protons are liberated (c) Plants are grown in controlled environment (d) Mutations are produced in plants 7. The natural plant hormones were first isolated from (a) Corn germ oil and human urine (b) Cotton fruits, spinach leaves and rice plants (c) Avena coleoptile spinach leaves and the fungus gibberella (d) Human urine and rice seedlings 8. Who used the term phytohormones for plant hormone (a) Balis (b) Morgan (c) Went (d) Thimman 9. Which of the following is plant hormone (a) Auxin (b) Morphactin (c) Gibberellin (d) All the above 10. Grass coleoptile tip bend towards source of light because (a) It likes the sun (b) It is heavy (c) It needs darkness (d) Due to some secretion from tip 11. Leaf fall occurs on abscission layer is formed when the content of (a) Auxin increases (b) Auxin decreases (c) Abscisic acid decreases (d) Gibberellic acid decreases 12. Auxins were discovered by (a) Thimman (c) Butler (b) Went (d) Skoog

3 13. Apical dominance in higher plants is due to (a) Balance between auxin and cytokinin (b) Enzyme activity and metabolism (c) Carbohydrates (d) Photoperiodism 14. Cell elongation in plants is caused by (a) Auxin (b) Gibberellin (c) Florigen (d) Traumatin 15. Indole 3 acetic acid called as auxin was first isolated from (a) Human urine (b) Corn germ oil (c) Fusarium (d) Rhizopus 16. Gibberellin was first extracted from (a) Gibberella fujikuroi (b) Algae (c) Bacteria (d) Roots of higher plants 17. Specific property attributed to gibberellins is (a) Shortening of genetically tall plants (b) Elongation of genetically dwarf plant (c) Promotion of rooting (d) Yellowing of young leaves 18. Gibberellic acid has been successfully used to induce flowering (a) In short day plants under long day conditions (b) In long day plants under short day conditions (c) For some plants (d) None of the above 19. Cell elongation in internodal region takes place due to (a) Gibberellins (b) Ethylene (c) Cytokinins (d) Indole acetic acid 20. Which of the following plant hormone substitutes for long photoperiods in flowering plants (a) Auxins (b) Gibberellins (c) Cytokinins (d) Ethylene 21. Cytokinin is a hormone whose main function is (a) Induction of cell division and delay in senescence (b) To take part in cell division (c) Refers to cell movements (d) To cause dormancy 22. Which hormone is concerned chiefly with cell division in plants? (a) IAA (b) Kinin (c) GA 2 (d) 2, 4 D 23. Which of the following causes delaying of senescence? (a) Cytokinins (b) Auxins (c) Gibberellins (d) Ascorbic acid 24. The word cytokinin which induces cell division was given by (a) Yabuta (b) Brown (c) Letham (d) Fitting 25. Leaf fall can be prevented by (a) Florigen (b) Auxin (c) Cytokinins (d) Abscisic acid 26. Pineapple can be made to flower in off season by (a) Ethylene/NAA (b) Zeatin (c) Short day (d) Temperature

4 27. Ethylene gas (a) Is a saturated hydrocarbon (b) Slows down the ripening of apples (c) Retards ripening of tomatoes (d) Speeds up maturation of fruits and early ripening of some fruits 28. Recognition of ethylene as a natural plant hormone was done by (a) Haberlandt (b) Crocker (c) Richmond Lang 29. Ethylene is a (a) Gaseous hormone (c) Liquid gas mixture (d) Sorokin (b) Gaseous enzyme (d) Solid hormone 30. A higher proportion of ethylene is found in (a) Ripening banana (b) Green banana (c) Green apple (d) Fresh potato tuber 31. Abscisic acid controls (a) Shoot elongation (b) Cell elongation and cell wall formation (c) Cell division (d) Leaf fall and dormancy 32. The following is a naturally occurring growth inhibitors (a) IAA (b) ABA (c) NAA (d) GA 33. Which of the following is a plant hormone? (a) Dormin (b) Formalin (c) Acetylene (d) All the above 34. Wound hormone is called (a) Necrohormone (b) Hormone only (c) Auxins (d) Phyllocaline 35. Maleic hydrazide is used to (a) To prolong dormancy (b) To break dormancy (c) Both (a) and (b) (d) None of the above 36. Which of the following factors influence the process of flowering (a) Acidity of soil (b) Water in the soil (c) Amount of green pigment (d) Photoperiod 37. With which of the following process Cholodny Went theory is concerned (a) Phototropism (b) Photomorphogenesis (c) Photorespiration (d) Photoperiodism 38. Pigment phytochrome is involved in (a) Phototropism (b) Photorespiration (c) Photoperiodism (d) Geotropism 39. The red absorbing form of phytochrome gets converted to the far red absorbing form after getting irradiated at (a) 660 nm (b) 730 nm (c) 530 nm (d) 660 nm to 730 nm 40. The pigment involved in red far red light interconversion is (a) Cytochrome (b) Xanthophyll (c) Lycopen (d) Phytochrome

5 41. Sleep movements in Samanea saman are regulated by (a) N (b) P (c) K (d) Mg 42. If the stem grows towards sunlight and root grows just opposite to it, the stem movement is called (a) Negative phototropic movement (b) Phototropic movement (c) Positive phototropic movement (d) None of the above 43. Movements of leaves of sensitive plant, Mimosa pudica are due to (a) Thermonasty (b) Seismonasty (c) Hydrotropism (d) Chemonasty 44. An apparatus commonly used to demonstrate phototropism is (a) Heliotropic chamber (b) Clinostat (c) Arc Auxanometer (d) Potometer 45. Tertiary roots are (a) Positively geotropic (b) Negatively geotropic (c) Plagiogeotropic (d) Ageotropic 46. During cell enlargement phase of growth, molecules of new cell wall material are inserted between the original molecules of stretched wall. This process is known as (a) Intussusception (b) Apposition (c) Integration (d) None of the above 47. If a planter is interested in obtaining a good crop of tea leaves from a single plant, he should (a) Feed auxin to the plant through soil (b) Remove the apical bud of the main shoot and the branches (c) Cut off the tip of the plant and then apply auxins to the cut end (d) Supply auxin from the tip of the plant as well as through roots 48. Phytohormones are (a) Hormones regulating growth from seed to adulthood (b) Growth regulators synthesised by plants and influencing physiological processes (c) Hormones regulating flowering (d) Hormones regulating secondary growth 49. Match the table (a) Maheshwari (I) Pre-sowing treatment of seeds of Phaseolus aureus with IAA (b) Das (II) Avena curvature test (c) Went (III) Work on seedless fruit in cucumber (d) Chakravarty (IV) Successful culture of a ovule of Papaver using IAA and kinetin A B C D (a) IV III II I (b) I II III IV (c) II III IV I (d) III I IV II 50. Match the following A B (1) Auxin (I) Ripening and maturity of fruits (2) Gibberellin (II) Differentiation of xylem elements (3) Cytokinin (III) Prevention of genetic and physiological dwarfism (4) Ethylene (IV) Found from tumour tissue of tobacco (1) (2) (3) (4) (a) IV III II I

6 (b) IV II III I (c) II III IV I (d) III IV II I 51. In tissue culture experiments in tobacco callus, it was seen that when the culture medium contains 2 ppm of IAA and 2 ppm of kinetin an undifferentiated mass of callus is produced. If the ratio of kinetin to IAA is increased (a) The callus size would increase by repeated cell divisions (b) Root initiation would take place (c) Shoot initiation would occur (d) The callus would die 52. Moving on a grass lawn facilitates better maintenance primarily owing to (a) Removal of apical dominance and promotion of lateral meristem (b) Removal of apical dominance (c) Wounding which stimulate rapid regeneration (d) None of the above 53. Apical dominance means (a) Suppression of growth of apical bud by axillary buds (b) Suppression of growth of axillary buds by presence of apical bud (c) Stimulation of growth of apical bud by removal of axillary buds (d) Inhibition of growth of axillary buds by removal of apical bud 54. A plant placed near a window bends outwards because (a) Its tip is able to get more oxygen (b) Its tip is able to obtain more light (c) Its tip is able to receive necessary warmth (d) The auxin contents on the shadow side is higher than that on the lighter side and as a result the shaded side elongate more than the cells on the illuminated side and the tip bends outwards 55. Which of the following statement is false with respect to application of auxins (a) Control direction of growth of plants (b) Inhibits lateral bud growth (c) Initiate and promote cell division actively particularly in tissue culture (d) Produce hyper elongation effect 56. A green plant bends towards the source of light when exposed to the light on only one side, it bends towards the source of light as it grows. Which of the following is the best explanation of the phenomenon (a) The apices of their stems are attracted by light (b) They need light for photosynthesis (c) Some auxins accumulates on the shaded side to induce greater cell elongation on that side (d) Light stimulates the cells on the illuminated side to increase in length 57. Which arrangement of an agar block on an oat coleoptile would result in IAA collecting in the agar (a) (b) (c) (d) Light 58. Exogenous application of gibberellins induces male flower formation on genetically female plants in (a) Carica (b) Cucumis (c) Coccinia (d) Cucurbita

7 59. A genetically dwarf plant can be converted into a tall plant by the use of (a) Kinetin (b) GA 3 (c) IAA/X-rays (d) 2, 4 D 60. Went (1928) reported that auxin moves from apical to basal end i.e., basipetally the movement is quite fast, in root is about (a) 0 to 1 cm/h (b) 0.1 to 0.2 cm/h (c) 0.2 to 0.3 cm/h (d) 0.3 to 0.4 cm/h

8 OMR SHEET Q S NO. A B C D 1 O O O O 2 O O O O 3 O O O O 4 O O O O 5 O O O O 6 O O O O 7 O O O O 8 O O O O 9 O O O O 10 O O O O 11 O O O O 12 O O O O 13 O O O O 14 O O O O 15 O O O O 16 O O O O 17 O O O O 18 O O O O 19 O O O O 20 O O O O 21 O O O O 22 O O O O 23 O O O O 24 O O O O 25 O O O O 26 O O O O 27 O O O O 28 O O O O

9 29 O O O O 30 O O O O 31 O O O O 32 O O O O 33 O O O O 34 O O O O 35 O O O O 36 O O O O 37 O O O O 38 O O O O 39 O O O O 40 O O O O 41 O O O O 42 O O O O 43 O O O O 44 O O O O 45 O O O O 46 O O O O 47 O O O O 48 O O O O 49 O O O O 50 O O O O 51 O O O O 52 O O O O 53 O O O O 54 O O O O 55 O O O O 56 O O O O 57 O O O O 58 O O O O 59 O O O O

10 60 O O O O TYPE-2 VERY SHORT ANSWER QUESTION [10 1 = 10M ] 1. What is growth? 2. What is seed dormancy? 3. State the main causes of seed dormancy. 4. Why is the seed germination in castor described as epigeal? 5. What is viviparous germination?

11 6. What is growth rate? 7. What is absolute growth rate? 8. What are phytohormones? 9. Why ABA is called stress hormone? 10. Why is art of pruning practised by gardeners?

12 TYPE-3 SHORT ANSWER QUESTION [8 2 = 16M ] 1. What is osmosis? What are its two types? 2. Write a short note on epigeal germination.

13 3. Write a short note on viviparous germination.

14 4. Distinguish between hypogeal germination and epigeal germination. 5. Write a short note on grand period of growth.

15 6. Write a short note on formative phase.

16 7. Sketch and label a typical growth curve. 8. Write a short notes on the following: i) Avena curvature test ii) Apical dominance

17 TYPE-4 ANSWER IN BRIEF TYPE QUESTION [6 3 = 18M ] 1. Give the applications of auxins.

18 2. Explain the role of abscisic acid as a stress hormone.

19 3. Enlist the five main types of growth regulators and state the role of abscisic acid in plants. 4. What is growth? what are its characteristics?

20 5. What are plant growth regulators? give the characteristics of plant growth regulators.

21 6. What are cytokinin s? Enlist the role of cytokinin s.

22 TYPE-5 LONG ANSWER TYPE QUESTION [4 5 = 20 M ] 1. Define vernalization. Describe the mechanism of vernalization.

23 2. What is photoperiodism? Explain how plants are classified on the basis of photoperiods required.

24 3. What are gibberellins? Enlist the applications of gibberellins.

25 4. Describe hypogeal seed germination.

26 BEST OF LUCK They all attain perfection When they find joy in their work. Srimadbhagwadgita

Plant Growth Regulators(NCERT)

Plant Growth Regulators(NCERT) Promoters: 1. Auxins: -first isolated from urine, contains Zinc. -Natural: Indole Acetic Acid (IAA) Indole Butyric Acid (IBA) -Synthetic: Naphthalene Acetic Acid (NAA) 2-4