Consider the following observations regarding the role of common and important chemical elements in the Human Body:
1. Phosphorus is a part of energy storage molecules
2. Potassium is useful for water-ion balance in body fluids
3. Sulphur is an structural component of some proteins
4. Iron is a basic component of haemoglobin
5. Magnesium is a Cofactor for many enzymes
Which among the above observations is / are correct?

Answer: [D] 1, 2, 3, 4 & 5

  • Oxygen – Part of water and most organic molecules; essential to physiological processes
  • Carbon – Basic component of organic molecules
  • Hydrogen – Part of most organic molecules and water
  • Nitrogen- Component of proteins and nucleic acids
  • Calcium – Component of bones; essential for nerves and muscles; blood clotting
  • Phosphorus – Part of cell membranes and energy storage molecules; component of bones, teeth, and nervous tissue
  • Potassium – Important for nerve function, muscle contraction, and water-ion balance in body fluids
  • Sulfur – Structural component of some proteins
  • Sodium – Primary ion in body fluids; essential for nerve function
  • Chlorine – Major ion in body fluids
  • Magnesium – Trace Cofactor for enzymes; important to muscle contraction and nerve transmission
  • Iron – Trace Basic component of hemoglobin

This question is a part of GKToday's Integrated IAS General Studies Module