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.

Answer: 3. Ca²⁺ ions are not important in maintaining the regular beating of the heart. Key idea: mathrmCa²⁺ and mathrmMg²⁺ both have important biological roles. mathrmMg²⁺ forms a complex with ATP (true). mathrmCa²⁺ is needed for blood clotting (true). mathrmMg²⁺ is in chlorophyll of green plant parts (true). mathrmCa²⁺ does help maintain the regular beating of the heart, so statement 3 is false.

Topic: Modern periodic law and periodic table, s, p, d, f blocks· Classification of Elements and Periodicity in Properties

Which of the following statements is false ?

1. \(Mg^{2+}\) ions form a complex with ATP.

2. \(Ca^{2+}\) ions are important in blood clotting.

3. \(Ca^{2+}\) ions are not important in maintaining the regular beating of the heart.

4. \(Mg^{2+}\) ions are important in the green parts of plants.

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 neet Save WhatsApp Report

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Answer: 3. \(Ca^{2+}\) ions are not important in maintaining the regular beating of the heart.

Key idea: \(\mathrm{Ca^{2+}}\) and \(\mathrm{Mg^{2+}}\) both have important biological roles.

\(\mathrm{Mg^{2+}}\) forms a complex with ATP (true).
\(\mathrm{Ca^{2+}}\) is needed for blood clotting (true).
\(\mathrm{Mg^{2+}}\) is in chlorophyll of green plant parts (true).
\(\mathrm{Ca^{2+}}\) does help maintain the regular beating of the heart, so statement 3 is false.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following statements is false ?

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