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Subject

Biology

Chapter

Ch 7Plant Growth and Mineral Nutrition

Weightage~5marksapprox

7.1Plant GrowthRead →

7.2Phases of GrowthRead →

7.3Conditions for GrowthRead →

7.4Growth Rate and Types of GrowthRead →

7.5Growth CurveRead →

7.6Differentiation, De-Differentiation, Re-DifferentiationRead →

7.7DevelopmentRead →

7.8PlasticityRead →

7.9Growth HormonesRead →

7.10PhotoperiodismRead →

7.11Vernalization (Yarovization)Read →

7.12Mineral NutritionRead →

7.13Nitrogen Cycle35 Q

CBSE Sample Papers31 Q

Q1Which of the following is not a photosynthetic pigment? (a) Carotene (b) Xanthophyll (c) Phycobillins (d) Anthocyanin Q2Sketch and label 'Ultrastructure of Chloroplast'.Q3Differentiate between cyclic and non-cyclic photophosphorylation.Q4What is 'photophosphorylation'? Describe non-cyclic photo-phosphorylation with schematic representation. Give its significance. **OR** What is 'RNA'? Explain different types of non-genetic RNA with diagrams and functions.Q5The reaction centre of P. S. II is ___. (a) Chl-a, 700 (b) Chl-a, 680 (c) Chl-a, 673 (d) Chl-a, 650 Q6What is leaching?Q7Sketch and label T. S. of a leaf showing Kranz anatomy.Q8Light and dark reactions are interdependant – Explain.Q9With the help of a suitable diagram, describe Ultra structure of the cell organelle, which is essential for photosynthesis. **OR** During photosynthesis "O2 is evolved from water molecule and not from CO2". Give the experimental proof given by Robert Hill.Q10To avoid photorespiration, which anatomical peculiarities are shown by C4 plants?Q11With the help of a suitable diagrammatic representation explain HSK pathway.Q12____ hormone responsible for efflux of k+ ions from guard cells and act as antitranspirant. (a) Gibberellins (b) Cytokinin (c) Ethylene (d) Abscissic acid Q13Which is the primary precursor of IAA in plants?Q14Abscissic acid is the common name given to two identical substances isolated separately. Name them. Give the chemical features of abscissic acid.Q15Describe physiological effect and applications of gaseous hormone in plants.Q16Which of the following is the only gaseous plant growth regulator? (a) ABA (b) Cytokinin (c) Ethylene (d) Gibberellin Q17Complete the following box with reference to symptoms of mineral deficiency: Abscission | Pre-mature fall of flowers, fruits and leaves ? | Appearance of green and non-green patches on leaves Q18(a) Give reason - ABA is also known as antitranspirant. (b) Explain the role of chlorophyllase enzyme in banana.Q19(a) Name the hormone which is responsible for apical dominance. (b) A farmer wants to remove broad-leaved weeds from the jowar plantation in his field. Suggest any plant hormone to remove such weeds. (c) Mention any two applications of cytokinin.Q20Identify the growth hormone in plants which causes inhibitory effect. (a) Cytokinins (b) Abscissic acid (c) Gibberellin (d) Ethylene Q21What is the full form of IAA?Q22What is differentiation and redifferentiation?Q23Describe physiological effects and applications of ethylene.Q24In a plant, deficiency symptom called 'Die-back of shoots' was observed. This can be rectified by this element – (a) zinc (b) sulphur (c) iron (d) copper Q25The small pores present on woody stem surface with bark and which carry out gaseous exchange are ___. (a) stomata (b) hydathode (c) ventricles (d) lenticels Q26What is grand period of growth?Q27Due to environmental change in area, the fruits were taking more time for ripening. Which gaseous growth regulator can be suggested to fruit merchant? Give the source of the same in plants.Q28Draw the developmental flow chart in plant from seed germination to death of plant.Q29A cell divides mitotically into two. Daughter cells divide and redivide repeatedly. Such growth is called ___. (a) arithmetic growth (b) geometric growth (c) growth ratio (d) qualitative growth Q30Define the term chlorosis.Q31(a) What is grand period of growth? (b) Give two examples each of: (1) Growth promoters (2) Growth inhibitors

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biology
Ch 7 — Plant Growth and Mineral Nutrition

Question 56 of 66

Q. What is the full form of IAA?

Maharashtra MsbshseMaharashtra HSC (MSBSHSE) Board 2024Subjective· 1mImportance★★★★★est

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IAA stands for I \dots

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