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Which of the following statements is false?

1. Mg2+ ions form a complex with ATP
2. Ca2+ ions are important in blood clotting
3. Ca2+ ions are not important in maintaining the regular beating of the heart
4. Mg2+ ions are important in the green parts of plants

Correct answer: Ca2+ ions are not important in maintaining the regular beating of the heart

Solution

The statement 'Ca2+ ions are not important in maintaining the regular beating of the heart' is false because Ca2+ ions play a crucial role in muscle contraction, including the heart's regular beating.

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