Question

Which of the following compounds extensively has Mg as an important element in the living world? 

• A. Haemoglobin
• B. ATP
• C. Florigen
• D. Ferritin
• E. Chlorophyll

Answer 1

Answer: (E)

Biological compounds analysis:

• (A) Haemoglobin: Contains Fe (iron)
• (B) ATP: Contains P (phosphorus)
• (C) Florigen: Plant hormone (protein, no Mg)
• (D) Ferritin: Iron storage protein
• (E) Chlorophyll: Contains Mg as central atom in porphyrin ring

Thus, the correct option is (E): Chlorophyll.

Answer 2

1. Analyze the role of Mg (Magnesium) in biological compounds:

Magnesium (\( \text{Mg} \)) is an essential element in biological systems and plays a critical role in several biomolecules and processes. Let us evaluate each compound to determine which one extensively involves magnesium:

• (A) Haemoglobin:
  • Haemoglobin is a protein in red blood cells responsible for oxygen transport. It contains iron (\( \text{Fe} \)) at its active site, not magnesium. Thus, \( \text{Mg} \) is not important in haemoglobin.
• (B) ATP (Adenosine Triphosphate):
  • ATP is the primary energy currency of cells. Magnesium ions (\( \text{Mg}^{2+} \)) are crucial for stabilizing ATP and facilitating its role in energy transfer reactions. However, while \( \text{Mg} \) is important for ATP function, it is not a structural component of ATP itself.
• (C) Florigen:
  • Florigen is a plant hormone involved in flowering. It does not have any known association with magnesium as a structural or functional component.
• (D) Ferritin:
  • Ferritin is a protein that stores iron (\( \text{Fe} \)) in cells. Magnesium is not involved in ferritin's structure or function.
• (E) Chlorophyll:
  • Chlorophyll is the green pigment in plants that plays a vital role in photosynthesis. Magnesium is an integral part of the chlorophyll molecule, located at the center of the porphyrin ring. Without magnesium, chlorophyll cannot perform its function in capturing light energy.

2. Final answer:

The correct option is (E) Chlorophyll.