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  • Question

  • What organelle allows some protists to detect light?


  • Correct Answer
  • An organelle called Eyespot allows some protists to detect light It allows the cells to sense light direction and intensity and respond to it by swimming either towards the light (positive phototaxis) or away from the light (negative phototaxis) Eyespot is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids Eyespot-mediated light perception helps the cells in finding an environment with optimal light conditions for photosynthesis Eyespots are the simplest and most common "eyes" found in nature, composed of photoreceptors and areas of bright orange-red pigment granules 

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    • 1. First Olympic Games were held in

    • Options
    • A. 876 BC
    • B. 798 BC
    • C. 776 BC
    • D. 898 BC
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    • 2. The minimum age required to become the prime minister of India is


    • Options
    • A. 25 years
    • B. 30 years
    • C. 40 years
    • D. 35 years
      • Discuss
    • 3. India reached the final of the Davis Cup for the first time in...?

    • Options
    • A. 1964
    • B. 1966
    • C. 1970
    • D. 1974
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    • 4. Which of the following is tropical grassland?


    • Options
    • A. Taiga
    • B. Savannah
    • C. Pampas
    • D. Prairies
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    • 5. Indian Cancer Research institute is located at

    • Options
    • A. New Delhi
    • B. Calcutta
    • C. Chennai
    • D. Mumbai
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    • 6. The ratio of land to ocean in the southern hemisphere is

    • Options
    • A. 1 to 1.5
    • B. 1 to 1
    • C. 1 to 4
    • D. 1 to 10
      • Discuss
    • 7. How many players are there in Water Polo team?

    • Options
    • A. 4
    • B. 5
    • C. 6
    • D. 7
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    • 8. Gangubai hangal is the name associated with

    • Options
    • A. Literature
    • B. Music
    • C. Journalism
    • D. Environment
      • Discuss
    • 9. The largest production of mica in Asia is from


    • Options
    • A. Indonesia
    • B. Malaysia
    • C. Myanmar
    • D. India
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    • 10. Plants synthesis protein from

    • Options
    • A. starch
    • B. sugar
    • C. amino acids
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