Which of the following statements is false

Options

A. `Mg^(2+)` ions form a comlex with ATP
B. `Ca^(2+)` ions are important in blood clotting
C. `Ca^(2+)` ions are not important in maintaining the regular beating of the heart
D. `Mg^(2+)` ions are important in the green parts of plants

Answer

To determine which statement is false, let's analyze each statement one by one:

1. **Statement 1**: "Mg²⁺ is complex with ATP."
- Magnesium ions (Mg²⁺) are known to form complexes with adenosine triphosphate (ATP). This is true because Mg²⁺ stabilizes the ATP molecule, which is essential for various biochemical processes in the body. Therefore, this statement is **true**.

2. **Statement 2**: "Calcium 2⁺ ions are important in blood clotting."
- Calcium ions (Ca²⁺) play a crucial role in the blood clotting process. They are involved in the activation of various clotting factors, which are necessary for the formation of a blood clot. Hence, this statement is also **true**.

3. **Statement 3**: "Calcium 2⁺ ions are not important in maintaining the regular beating of the heart."
- This statement is **false**. Calcium ions (Ca²⁺) are essential for the contraction of cardiac muscle cells, which is crucial for maintaining the regular beating of the heart. Therefore, this statement is incorrect.

4. **Statement 4**: "Mg²⁺ ions are important in the green parts of the plant."
- Magnesium is a vital component of chlorophyll, the molecule responsible for photosynthesis in plants. Thus, Mg²⁺ ions are indeed important in the green parts of the plant. This statement is **true**.

Based on the analysis, the false statement is:
**"Calcium 2⁺ ions are not important in maintaining the regular beating of the heart."**