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Mineral Nutrition · Question 50

AIPMT 2001MCQMedium📈 Topic in 0% papers+4−1
1

Passive absorption of minerals depends on

  1. temperature
  2. temperature and metabolic inhibitor
  3. metabolic inhibitor
  4. humidity

Answer

(1) temperature

Solution

Passive absorption of mineral ions takes place by diffusion and ion exchange along a concentration gradient; it does not use metabolic energy (ATP).

∴ It is not affected by metabolic inhibitors, but the rate of diffusion increases with temperature.

⇒ Passive absorption depends on temperature.

Answer: (1)

Out of syllabusAIPMT 2001

Keep practising — Mineral Nutrition

2

Roots of which plant contain a red pigment which has affinity for oxygen?

  1. Carrot
  2. Soybean
  3. Mustard
  4. Radish
Out of syllabusAIPMT 2001
3

Mg is a component of

  1. chlorophyll
  2. cytochrome
  3. haemoglobin
  4. haemocyanin
Out of syllabusAIPMT 2000
4

Plants take zinc in the form of

  1. ZnSO4
  2. Zn2+
  3. ZnO
  4. Zn
Out of syllabusAIPMT 2000
5

When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are

  1. yellowish leaves
  2. colourless petiole
  3. dark green leaves
  4. shoot apex dies
Out of syllabusAIPMT 2000

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