Question

Match the following: \[ \begin{array}{|c|c|} \hline \text{List-I (Element)} & \text{List-II (Significance)}
\hline A. \text{Copper} & I. \text{Activator of carboxylase}
B. \text{Zinc} & II. \text{Component of nitrogenase}
C. \text{Molybdenum} & III. \text{Chlorophyll structure}
D. \text{Magnesium} & IV. \text{Component of cytochrome C}
\hline \end{array} \]

• A.
• B.
• C.
• D.

Hint:

In biological systems, each trace element plays a crucial role in different enzymatic functions. Always remember the specific roles of elements in enzymatic processes and their interactions in plant and animal physiology.

Answer 1

The Correct Option is B

Understanding the functions of elements in biological systems
- A - Copper = IV (Component of cytochrome C)
- Copper plays a crucial role as a component of cytochrome C, which is essential in the electron transport chain for cellular respiration.
- B - Zinc = I (Activator of carboxylase)
- Zinc acts as an activator of carboxylase enzymes, which play a role in carbon fixation and metabolism.
- C - Molybdenum = II (Component of nitrogenase)
- Molybdenum is a key component of nitrogenase, the enzyme responsible for nitrogen fixation in plants.
- D - Magnesium = III (Chlorophyll structure)
- Magnesium is a central element in chlorophyll, essential for photosynthesis.
Examining the given options
- Option 1 (A-I, B-III, C-II, D-IV) → Incorrect (Copper does not activate carboxylase).
- Option 2 (A-IV, B-I, C-II, D-III) → Correct, as it matches all elements correctly.
- Option 3 (A-I, B-IV, C-II, D-III) → Incorrect (Zinc is not a cytochrome component).
- Option 4 (A-II, B-IV, C-I, D-II) → Incorrect (Misalignment of Copper, Zinc, and Magnesium).
Conclusion
Since the correct matching is A-IV, B-I, C-II, D-III, the correct answer is Option (2).