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Biomolecules question

2019 · 12 Jan · Shift 2 · Q3
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Biomolecules question

2019 · 12 Jan · Shift 2 · Q3

JEE MainChemistryBiomoleculesMCQ+4 / −1
The correct statement (s) among I to III with respect to potassium ions that are abundant within the cell fluid 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
    III only
  2. B
    I and II only
  3. C
    I and III only
  4. D
    I, II and III only
View written solutionFree

Correct answer: D

  1. Given statements about intracellular potassium ions, K+\mathrm{K^+}K+

    We need to check which of the following are correct:

    • 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

  2. Evaluate Statement I

    Potassium ions are major intracellular cations and are known to activate several enzymes involved in metabolism.

    So, Statement I is correct.

  3. Evaluate Statement II

    Potassium ions are important in cellular metabolism. In standard biomolecule/NCERT context, intracellular K+\mathrm{K^+}K+ helps in processes associated with oxidation of glucose to generate ATP.

    So, Statement II is correct.

  4. Evaluate Statement III

    The sodium–potassium ion gradient across the cell membrane is essential for nerve impulse transmission.

    So, Statement III is correct.

  5. Conclusion

    All three statements I, II, and III are correct.

    Therefore, the correct option is:

    D: I, II and III only\boxed{\text{D: I, II and III only}}D: I, II and III only​

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