The following metal ion activates many enzymes, participates in the oxidation of glucose to produce

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Question

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

Accepted Answer

Correct Answer: C — PotassiumStep-by-step Solution:The description fits potassium (K⁺):K⁺ acts as a cofactor for several enzymes, including pyruvate kinase involved in glucose oxidation and ATP synthesis. The Na⁺/K⁺-ATPase pump (sodium-potassium pump) is responsible for maintaining the electrochemical gradient across nerve cell membranes and is essential for the transmission of nerve impulses.Why other options are incorrect:Copper (Cu²⁺) is involved in redox enzymes (e.g., cytochrome oxidase) but is not associated with nerve signal transmission alongside Na. Calcium (Ca²⁺) is involved in muscle contraction and blood clotting. Iron (Fe²⁺/³⁺) is a component of haemoglobin and cytochromes but does not participate in nerve signal transmission with Na.Key Concept: The Na⁺/K⁺-ATPase pump transports 3 Na⁺ ions out and 2 K⁺ ions into the cell per ATP hydrolysed. This maintains the resting membrane potential essential for nerve impulse propagation.

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

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The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

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More Questions from The s-Block Elements

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