PYQSide ExamsMy practice

Mineral Nutrition · Question 44

AIPMT 2005MCQMedium📈 Topic in 25% papers+4−1
1

The deficiencies of micronutrients, not only affect growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?

  1. Co, Ni, Mo
  2. Ca, K, Na
  3. Mn, Co, Ca
  4. Cu, Mn, Fe

Answer

(4) Cu, Mn, Fe

Solution

Fe: part of cytochromes and ferredoxin (electron carriers in both chloroplasts and mitochondria).

Cu: part of plastocyanin (photosynthetic electron transport) and cytochrome c oxidase (mitochondrial electron transport).

Mn: needed for the splitting of water (photolysis) that supplies electrons to the photosynthetic electron transport chain.

Ca, K, Na, Co, Ni, Mo are not components of these electron carriers.

Cu, Mn and Fe affect electron transport most.

Answer: (4)

Out of syllabusAIPMT 2005

Keep practising — Mineral Nutrition

2

If by radiation all nitrogenase enzymes are inactivated, then there will be no

  1. fixation of nitrogen in legumes
  2. fixation of atmospheric nitrogen
  3. conversion from nitrate to nitrite in legumes
  4. conversion from ammonium to nitrate in soil.
Out of syllabusAIPMT 2004
3

Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone

  1. auxin
  2. cytokinin
  3. ethylene
  4. abscisic acid.
AIPMT 2003
4

Gray spots of oat are caused by deficiency of

  1. Cu
  2. Zn
  3. Mn
  4. Fe
Out of syllabusAIPMT 2003
5

Boron in green plants assists in

  1. activation of enzymes
  2. acting as enzyme co-factor
  3. photosynthesis
  4. sugar transport
Out of syllabusAIPMT 2003
6

Enzyme first used for nitrogen fixation

  1. nitrogenase
  2. nitroreductase
  3. transferase
  4. transaminase
AIPMT 2001
7

Passive absorption of minerals depends on

  1. temperature
  2. temperature and metabolic inhibitor
  3. metabolic inhibitor
  4. humidity
Out of syllabusAIPMT 2001
8

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
9

Mg is a component of

  1. chlorophyll
  2. cytochrome
  3. haemoglobin
  4. haemocyanin
Out of syllabusAIPMT 2000
10

Plants take zinc in the form of

  1. ZnSO4
  2. Zn2+
  3. ZnO
  4. Zn
Out of syllabusAIPMT 2000
11

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

All Mineral Nutrition PYQs →

PDFDownload Mineral Nutrition PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)