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JEE Main · 2019 · 12 Jan 2019 · Shift 2 · s-Block Elements

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The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are :
I. They activate many enzymes
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions, they are responsible for the transmission of nerve signals
  1. (A)I and II only
  2. (B)I and III only✓ Correct
  3. (C)I, II and III
  4. (D)III only

Answer: (B)

Solution

Potassium ions activate many enzymes, so statement I holds, and together with sodium ions, through the pump, they carry the transmission of nerve signals, so statement III holds. They are not the species responsible for oxidising glucose to ATP, so statement II fails. Only I and III are correct.

JEE Main · 2019 · 12 Jan 2019 · Shift 2 · Single correct option

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