Which one of the following statements is correct? 
1. Mg plays role in neuromuscular function and interneuronal transmission. 
2. The daily requirement of Mg and Ca in the human body is estimated to be 0.2-0.3 g. 
3. All enzymes that utilize ATP in phosphate transfer require Ca as the cofactor.
4. The bone in the human body is an inert and unchanging substance. 
Subtopic:  Biological Importance of S Block Elements and & Its Ore |
From NCERT
NEET - 2023
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NEET 2026 - Target Batch - Vital
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Which of the following statements is false?
 

1. Ca2+ ions are important in blood clotting
2. Ca2+ ions are not important in maintaining the regular beating of the heart
3. Mg2+ ions are important in the green parts of plants
4. Mg2+ ions form a complex with ATP
Subtopic:  Biological Importance of S Block Elements and & Its Ore |
 78%
From NCERT
NEET - 2016
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NEET 2026 - Target Batch - Vital
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Which of the following biologically important ions is also a constituent of the sodium pump?

1. Ca2+
2. Mg2+
3. K+
4. Fe2+

Subtopic:  Biological Importance of S Block Elements and & Its Ore |
 88%
From NCERT
NEET - 2015
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NEET 2026 - Target Batch - Vital
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Match List I with List II for the composition of substances and select the correct answer using the code given below:

List-I   Substances

       List-II  
  Composition

(A) Plaster of paris (i) CaSO4. 2H­O
(B) Epsomite (ii) CaSO4.½H2O
(C) Kieserite (iii) MgSO4.7H2O
(D) Gypsum (iv) MgSO4.H2O
(v) CaSO4

Code :

(A) (B) (C) (D)
1. (iv) (iii) (ii) (i)
2. (iii) (iv) (i) (ii)
3. (ii) (iii) (iv) (i)
4. (i) (ii) (iii) (v)
Subtopic:  Biological Importance of S Block Elements and & Its Ore |
 87%
From NCERT
AIPMT - 2011
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