Biology Past Paper PDF - Class 12th - Chapter 7 - New Indian Era's
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New Indian Era's
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This document contains a biology past paper from New Indian Era's. The paper is for class 12th and focuses on chapter 7 and includes multiple choice questions, short answer questions and problem solving type questions. The topics cover several important concepts and vocabulary of biology, such as plant hormones, photosynthesis and respiration.
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New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET || IMP Q.|| Chapter-7|| Biology-1|| Class 12th 1) (a) Name the hormone which is responsible for apical dominance. (b) A farmer wants to remove broad-le...
New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET || IMP Q.|| Chapter-7|| Biology-1|| Class 12th 1) (a) Name the hormone which is responsible for apical dominance. (b) A farmer wants to remove broad-leaved weeds from the jawar plantation in his field. Suggest any plant hormone to remove such weeds. (c) Mention any two applications of cytokinin. 2) (a) Give reason - ABA is also known as antitranspirant. (b) Explain the role of chlorophyllase enzyme in banana. 3) Complete the following box with reference to symptoms of mineral deficiency : Abscission Prematuar fall of flowers, fruits and leaves ………………… Appearance of green and non-green patches on leaves. 4) Anita observed apical dominance in her plant. Name and describe the plant hormone that will reverse the effect. 5) Name the hormone used for early rooting in propagation by cutting. 6) Name the stress hormone in plants. Describe its physiological effects. 7) Describe physiological effect and applications of gaseous hormone in plants. 8) Ascissic acid is the common name given to two identical substances isolated separately. Name them. Give the chemical features of abscisic acid New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET || IMP Q.|| Chapter-7|| Biology-1|| Class 12th 9) Which is the primary precursor of IAA in plants? 10) Pick up the options and complete the chart given below and rewrite Sr. No Hormone Example Function 1 ………….. IAA Cell elongation 2 Auxin IBA ………….. 3 Stress hormone ………….. Delay Cell division 4 ………….. Zeatin Cell division 5 Abscissic acid ABA ………….. 6 Auxin ………….. Flowering in Pineapple 11) Give any four physiological effects and applications of ethylene. 12) Give the name of deficiency symptoms caused due to sulphur in stem and root tips.
