sblock Elements 1 Question 11
7. The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are
(2019 Main, 12 Jan II) 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.
(a) I, and III only
(b) I, II and III
(c) I and II only
(d) III only
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Solution:
- All the statements are correct. $\mathrm{K}^{+}$being metallic unipositive ions work as enzyme activators. These also participate in many reactions of glycolysis and Kreb’s cycle to produce ATP from glucose.
Being unipositive these are also equally responsible for nerve signal transmission along with $\mathrm{Na}^{+}$. ( $\mathrm{Na}^{+}$ion-pump theory)
