Assertion: Magnesium is important in carbohydrate and protein metabolism. Reason: Mg²⁺ is involved in the synthesis of Nucleic acids.

Both assertion and reason are true and the reason is the correct explanation for the assertion.

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Both the reason and assertion are true but the assertion is not the correct explanation for reason.

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Assertion is true but reason is false.

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Both the reason and assertion are false

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Solution

The correct option is A Both assertion and reason are true and the reason is the correct explanation for the assertion.
Magnesium is a constituent of chlorophyll molecule, without which photosynthesis would not occur. Many of the enzymes involved in carbohydrate metabolism require Mg as an activator. Magnesium is also an activator for those enzymes involved in the synthesis of nucleic acids (DNA,RNA) from nucleotide phosphate.

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Assertion: Magnesium is important in carbohydrate and protein metabolism. Reason: Mg2+ is involved in the synthesis of Nucleic acids.

Assertion: Magnesium is important in carbohydrate and protein metabolism. Reason: Mg²⁺ is involved in the synthesis of Nucleic acids.