| Consider the following statements. |
| I. Calcium present as calcium pectate in the middle lamella of cell wall that joins adjoining cells together. |
| II. Magnesium forms part of the chlorophyll molecule. |
| III. Molybdenum activates the enzyme nitrate reductase. |
| IV. Phosphorus brings about opening and closing of stomata. |
| V. Which of the statements given above are correct? |
A) I, II and III
B) I, III and IV
C) II, III and IV
D) Ill and IV
Correct Answer: A
Solution :
Potassium brings about opening and closing of stomata. Phosphorus required for the synthesis of nucleic acids, phospholipids, ATP, NAD and NADP.
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