Solved: CHEMISTRY Question for NEET

NEET CHEMISTRYEasy

Which of the following statements is false?

Ca $^{2+}$ ions are important in blood clotting

Ca $^{2+}$ ions are not important in maintaining the regular beating of the heart

Mg $^{2+}$ ions are important in the green parts of plants

Mg $^{2+}$ ions form a complex with ATP

Blood Clotting: Calcium ions ( $Ca^{2+}$ ) play a very important role in the coagulation (clotting) of blood . Thus, the first statement is true.
Heart Beat: Calcium ions are essential for muscle contraction . The heart is a muscular organ, and its rhythmic contraction (beating) relies on the regulation of $Ca^{2+}$ levels. Low levels of $Ca^{2+}$ can lead to tetany (wild contractions) . Therefore, the statement that $Ca^{2+}$ ions are not important for the regular beating of the heart is false.
Photosynthesis: Chlorophyll, the green pigment responsible for photosynthesis in plants, is a coordination compound of magnesium ( $Mg^{2+}$ ) . Thus, the third statement is true.
ATP Complex: In biological systems, Magnesium ions ( $Mg^{2+}$ ) are required as cofactors for enzymes that utilise ATP in phosphate transfer. $Mg^{2+}$ forms a complex with ATP (Adenosine Triphosphate), making it biologically active . Thus, the fourth statement is true.

Practice Mode Available

Join thousands of students and practice with AI-generated mock tests.