In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 11 Biology Chapter 12 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Biology Mineral Nutrition to know their preparation level.

In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Mineral Nutrition Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 12 Mineral Nutrition

Case Study/Passage-Based Questions

Case Study 1:

Essential elements perform several functions. They participate in various metabolic processes in the plant cells such as permeability of cell membrane, maintenance of osmotic concentration of cell sap, electron transport systems, buffering action, enzymatic activity and act as major constituents of macromolecules and co-enzymes.

Nitrogen is the essential nutrient element required by plants in the greatest amount. It is absorbed mainly as NO3 – though some are also taken up as NO2 – or NH4 + . Nitrogen is required by all parts of a plant, particularly the meristematic tissues and the metabolically active cells. Nitrogen is one of the major constituents of proteins, nucleic acids, vitamins and hormones.

Phosphorus is absorbed by the plants from soil in the form of phosphate ions. Phosphorus is a constituent of cell membranes, certain proteins, all nucleic acids and nucleotides, and is required for all phosphorylation reactions.

Potassium is absorbed as potassium ion (K+ ). In plants, this is required in more abundant quantities in the meristematic tissues, buds, leaves and root tips. Potassium helps to maintain an anion-cation balance in cells and is involved in protein synthesis, opening and closing of stomata, activation of enzymes and in the maintenance of the turgidity of cells.

Plant absorbs calcium from the soil in the form of calcium ions (Ca2+). Calcium is required by meristematic and differentiating tissues. During cell division it is used in the synthesis of cell wall, particularly as calcium pectate in the middle lamella. It is also needed during the formation of mitotic spindle. It accumulates in older leaves. It is involved in the normal functioning of the cell membranes. It activates certain enzymes and plays an important role in regulating metabolic activities.

Plants obtain iron in the form of ferric ions (Fe3+). It is required in larger amounts in comparison to other micronutrients. It is an important constituent of proteins involved in the transfer of electrons like ferredoxin and cytochromes. It is reversibly oxidised from Fe2+ to Fe3+ during electron transfer. It activates catalase enzyme, and is essential for the formation of chlorophyll.

1.) Nitrogen is absorbedas

• a) NO3 –, NO2 + or NH4 +
• b) NO3 –, NO3 – or NH4 +
• c) NO3 –, NO2 – or NH4 +
• d) NO3 +, NO2 – or NH4 –

Ans: c) NO3 –, NO2 – or NH4 +

2.) Phosphorus is absorbed by the plants from soil in the form of _____________

• Phosphorus ions
• Phosphate ions
• Phosulphate ions
• Phosphoric ions

Ans: Phosphate ions

3.) Name the element which required by plant in highest amount.

Ans: Nitrogen is the essential nutrient element required by plants in the highest amount. Nitrogen is required by all parts of a plant, particularly the meristematic tissues and the metabolically active cells. Nitrogen is one of the major constituents of proteins, nucleic acids, vitamins and hormones.

4.) Name the element which is an important constituent of electron acceptor proteins involved in the transfer of electrons.

Ans: Iron is an important constituent of proteins involved in the transfer of electrons like ferredoxin and cytochromes.

5.) Name the element which plays an important role in stomata functioning.

Ans: Potassium is absorbed as potassium ion (K+ ) plays an important role in opening and closing of stomata and activation of enzymes and in the maintenance of the turgidity of cells.

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