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Biology

Plant Anatomy And Physiology MCQs

Practice Plant Anatomy And Physiology MCQs for competitive exams.

Plant Anatomy And Physiology MCQs

Practice questions from this topic.

Consider the following statements and choose the correct answer: 1. The absorption spectra of chlorophyll and bacteriochlorophyll are characteristic and distinct 2. Though not identical chemically, the accessory pigments of higher plants and photosynthetic bacteria serve the same function 3. Cyclic and non-cyclic photo phosphorylation occur only in case of higher plants 4. Bacterial photosynthesis occurs in presence of light and oxygen

  1. A. Only 1, 2 and 3 are true
  2. B. Only 1 and 2 are true
  3. C. Only 2, 3 and 4 are true
  4. D. 1, 2, 3 and 4 are true
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An enzyme has a distinct cavity or cleft in which the substrate is bound, known as

  1. A. Enzyme site
  2. B. Reaction site
  3. C. Control site
  4. D. Active site
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The species distributed in a belt around the north-pole include

  1. A. Saxifraga oppositaefolia
  2. B. Ranunculus nivalis
  3. C. Carex lapponica
  4. D. All of the above
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Mycorrhizae are formed by the association of

  1. A. A fungus with the roots in the soil
  2. B. An algae with the roots in the soil
  3. C. A virus with the roots in the soil
  4. D. A bacteria with the roots in the soil
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A formation of little trees upto 4 m in height which are richly armed with thorns and for the most part have ternate or pinnate leaves, but are leafless during dry season is known as

  1. A. Thorn bushland
  2. B. Thorn forest
  3. C. Orchard scrub
  4. D. None of the above
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Chemiosmotic coupling, the most widely accepted explanation of phosphorylation was proposed by

  1. A. Embden
  2. B. Myerhof
  3. C. Mitchell
  4. D. Parnas
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Which of the following elements is not essential for plant growth?

  1. A. Sodium
  2. B. Potassium
  3. C. Calcium
  4. D. Magnesium
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A cell increases in volume when it is placed in

  1. A. hypertonic solution
  2. B. hypotonic solution
  3. C. isotonic solution
  4. D. None of the above
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The first dominant colonists among the flora of Iithophytes are

  1. A. Algae and bryophytes
  2. B. Fungi and pteridophytes
  3. C. Algae and mosses
  4. D. Algae and lichens
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At very high intensity beyond a certain point, the photosynthesising cells exhibit photo-oxidation of its constituents. This phenomenon is caIled

  1. A. Polarization
  2. B. Solarization
  3. C. Photorespiration
  4. D. Phosphorylation
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According to Hatch and Slack, the primary carboxylation in C 4 plants takes place in the

  1. A. Bundle sheath cells
  2. B. Mesophyll cells
  3. C. Guard cells
  4. D. Epidermal cells
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Who among the following found that the application of synthetic auxins can bring about the development of an unpollinated ovary into a fruit?

  1. A. Gustafson (1936)
  2. B. Lewis (1942)
  3. C. Hostermann (1942)
  4. D. Cochran (1935)
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