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Indian Forest Service (Mains)

Chemistry optional

  • 2 papers
  • 200 marks each
  • 3 h per paper

Paper I covers physical and inorganic chemistry.

Indian Forest Service (Mains), Chemistry optional · 2022 · Paper I

Q6(b). The sodium–potassium pump

Question

Differentiate between active transport and passive transport through the cell membrane. What type of transport occurs in the Na⁺–K⁺ pump? How does this pump function? Explain with mechanism.

Answer in brief

The Na⁺/K⁺ ATPase performs primary active transport: one ATP drives three Na⁺ ions out of the cell and two K⁺ ions into it against their electrochemical gradients.

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Topic notes: bio-inorganic chemistry (haemoglobin, cytochromes, Fe–S proteins, ion pumps), with every Civil Services, IFoS and Geo-Scientist PYQ →

Coverssodium–potassium pumpNa+/K+ ATPaseactive transportpassive transportion transport across membranes

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