Question

Match the LIST-I with LIST-II

LIST-I Minerals	LIST-II  Deficiency Symptoms in Plants
A. Calcium	III. Necrosis of young meristematic regions such as root tips or young leaves
B. Zinc	IV. Display of rosette habit
C. Manganese	I. Intervenous chlorosis associated with the development of small necrotic spots
D. Nickel	II. Accumulation of Urea in the leaves

Choose the correct answer from the options given below:

• A. A-I, B - II, C - III, D - IV
• B. A-I, B - III, C - II, D - IV
• C. A-I, B - II, C - IV, D - III
• D. A-III, B - IV, C - I, D - II

Hint:

Focus on unique symptoms: "Rosette habit" is a keyword for Zinc deficiency. "Necrosis of young tips" points to an immobile element like Calcium. "Urea accumulation" is specifically linked to Nickel's role in the urease enzyme.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
This question requires matching essential mineral elements with their specific deficiency symptoms in plants.
Step 2: Detailed Explanation:


A. Calcium (Ca): Calcium is a structurally important component of the cell wall (as calcium pectate) and is relatively immobile within the plant. Therefore, deficiency symptoms appear first in young, growing tissues. A classic symptom is the necrosis (death) of young meristematic regions like root tips and young leaves. Thus, A matches with III.

B. Zinc (Zn): Zinc is required for the synthesis of auxin, a plant hormone that promotes cell elongation. Zinc deficiency leads to reduced auxin levels, causing stunted growth with short internodes, resulting in a rosette habit (leaves are clustered in a circular form). Thus, B matches with IV.

C. Manganese (Mn): Manganese is an activator for many enzymes and is essential for the water-splitting step in photosynthesis. Deficiency leads to interveinal chlorosis (yellowing between veins) and the development of necrotic spots. Thus, C matches with I.

D. Nickel (Ni): Nickel is a component of the enzyme urease, which is vital for metabolizing urea into ammonia. In the absence of nickel, urea can accumulate to toxic levels, leading to leaf tip necrosis. Thus, D matches with II.

Step 3: Final Answer:
The correct set of matches is A-III, B-IV, C-I, D-II, which corresponds to option (D).