(B) $Mg$ is an essential mineral element for plants. It serves as a vital constituent of the chlorophyll molecule,forming the central atom of the porp

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(B) $Mg$ is an essential mineral element for plants. It serves as a vital constituent of the chlorophyll molecule,forming the central atom of the porphyrin ring. Without $Mg$,chlorophyll cannot be synthesized,which directly impacts the plant's ability to perform photosynthesis. Therefore,the correct answer is $B$.

Class 11 Biology Mineral Nutrition Role of Macro and Micro-nutrients

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$A$ plant requires magnesium for

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A
protein synthesis
B
chlorophyll synthesis
C
cell wall development
D
holding cells together

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Class 11

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Mineral Nutrition

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Role of Macro and Micro-nutrients

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$S$ - Statement: Chlorine is the major anion present in the blood.
$R$ - Reason: Molybdenum is required for nitrogen fixation in plants.

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Which one of the following is a micro-element?

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Match the following items in List-$I$ with List-$II$ and select the correct option:

List-$I$ List-$II$

$(1)$ For repair of worn-out cells $(a)$ Phosphorus

$(2)$ In the structure of $ATP$ $(b)$ Magnesium

$(3)$ In the synthesis of $ATP$ $(c)$ Zinc

$(4)$ In the structure of myoglobin in muscles $(d)$ Iron

List-$I$	List-$II$
$(1)$ For repair of worn-out cells	$(a)$ Phosphorus
$(2)$ In the structure of $ATP$	$(b)$ Magnesium
$(3)$ In the synthesis of $ATP$	$(c)$ Zinc
$(4)$ In the structure of myoglobin in muscles	$(d)$ Iron