Flashcards For NEET Biology - Mineral Nutrition

Flashcards for NEET Biology are designed to boost your NEET preparation. Find below flashcards for Mineral Nutrition. These flashcards on Mineral Nutrition are prepared as per the NEET syllabus. This is helpful for aspirants of NEET and other exams during last-minute revision. Flashcards For NEET Biology – Mineral Nutrition, covers all the important points that are frequently asked in the exam. Check BYJU’S for the full set of Flashcards and Study material for NEET Biology. Solve NEET Biology MCQs to check your understanding and outperform in the exam.

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Mineral Nutrition

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Mineral Nutrition


Julius Von Sachs

Growing plants in nutrient solution (soil-free)


Present in excess of 10 mmole/kg of dry wt.

C, H, O, N, P, K, S, Ca, Mg

N requirement is the greatest


Less than 10 mmole/kg of dry wt.

Fe, Mn, Cu, Mo, Zn, B, Cl, Ni

Fe is required the most

Elements that activate enzymes

Mg2+ – RuBisCO and PEP carboxylase

Zn2+ – Alcohol dehydrogenase, carboxylase

Mo – Nitrogenase, nitrate reductase

Fe3+ – Catalase


Present in abundant quantities in meristematic tissues, buds, leaves and root tips

Plays role in opening and closing of stomata, protein synthesis, ionic balance, enzyme activation and turgidity


Calcium pectate in the middle lamella of cell wall

Mitotic spindle formation

Gets accumulated in older leaves and not remobilised


Amino acids- cysteine and methionine

Thiamine, biotin, coenzyme-A, ferredoxin


Absorbed as Fe3+

Electron transport proteins- ferredoxin, cytochromes

Formation of chlorophyll


Absorbed as Mg2+

Splitting of water during photosynthesis


Absorbed as Zn2+

Synthesis of auxin

Activation of carboxylases, alcohol dehydrogenase


Absorbed as BO33- and B4O72-

Required for Ca2+ uptake and utilisation

Pollen germination, cell elongation and differentiation

Carbohydrate translocation


Absorbed as MoO22+

Plays role in nitrogen metabolism


Absorbed as Cl

Required for ionic balance and splitting of water to liberate oxygen during photosynthesis

Actively mobile elements

Na, K, Mg

Deficiency symptoms first in older tissues

Immobile elements

Ca, S

Deficiency symptoms first in younger tissues


Loss of chlorophyll and yellowing of leaves

Due to deficiency of N, K, Mg, S, Fe, Mn, Zn and Mo


Death of tissue

Due to deficiency of Ca, Mg, Cu, K

Inhibition of cell division

Due to deficiency of N, K, S

Delay in flowering

Due to deficiency of N, S, Mo

Manganese toxicity

Chlorotic veins surrounded by brown spots

Induces deficiency of Fe, Mg and Ca


Ammonia to nitrite (NO2) by Nitromonas, Nitococcus

Nitrite to nitrate (NO3) by Nitrobacter


Nitrate is reduced to nitrogen by Pseudomonas, Thiobacillus

Biological nitrogen fixation

Atmospheric nitrogen is converted to ammonia by nitrogenase enzymes

Free-living nitrogen fixers

Aerobic- Azotobacter and Beijernickia

Anaerobic- Rhodospirillum

Cyanobacteria- Anabaena, Nostoc

Symbiotic nitrogen fixers

Rhizobium- in the root nodules of legumes, e.g. alfalfa, beans, peas, lentils, clover

Frankia- non-leguminous pleats, e.g. Alnus, Casuarina

Root nodule formation

Initiation in the cortex of the root

Requires 8 ATP molecules per molecule of ammonia produced

Energy is derived from respiration of host cells


Present in root nodules

Mo-Fe protein, oxygen sensitive enzyme

Converts atmospheric nitrogen to ammonia


Gives distinct pink colour to root nodules

Acts as a scavenger of oxygen and reduces free oxygen in root nodules for nitrogenase activity

Maintains high oxygen concentration bound to it for aerobic respiration

Utilisation of ammonia

Amination- Formation of glutamic acid from 𝛼-ketoglutarate. Enzyme involved is glutamate dehydrogenase

Transamination- Formation of other amino acids from glutamic acid

Transportation of nitrogen

Mostly as amides- asparagine and glutamine through xylem

As ureides in soybean

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