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1996 · Q104Science & TechnologyBiologymoderate

Living organisms require at least 27 elements, of which 15 are metals. Among these, those required in major quantities include

  1. (a)Potassium, Manganese, Molybdenum & Calcium
  2. (b)Potassium, Molybdenum, Copper & Calcium
  3. (c)Potassium, Sodium, Magnesium & Calcium
  4. (d)Sodium, Magnesium, Copper & Manganese
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Official answer(c) Potassium, Sodium, Magnesium & Calcium

2020 · Q47Science & TechnologyBiologyeasy

Which of the following statements are correct regarding the general difference between plant and animal cells ? 1. Plant cells have cellulose cell walls whilst animal cells do not. 2. Plant cells do not have plasma membrane unlike animal cells which do. 3. Mature plant cell has one large vacuole whilst animal cell has many small vacuoles. Select the correct answer using the code given below :

  1. (a)1 and 2 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(c) 1 and 3 only