A: Plants absorb nitrogen from the soil in th | vedclass

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Question

(B) is true: Plants primarily absorb nitrogen from the soil in the form of nitrates $(NO_3^-)$ or ammonium ions $(NH_4^+)$,which are salts.$R$ is true

Vedclass · Accepted Answer

$A$ and $R$ are both true,but $R$ is not the correct explanation of $A$.

Vedclass · Answer

(B) is true: Plants primarily absorb nitrogen from the soil in the form of nitrates $(NO_3^-)$ or ammonium ions $(NH_4^+)$,which are salts.$R$ is true: Nitrogen is a critical component of amino acids (the building blocks of proteins),nucleic acids ($DNA$ and $RNA$),vitamins,and chlorophyll.Conclusion: While both statements are scientifically correct,the fact that nitrogen is essential for protein synthesis $(R)$ does not explain why plants absorb it as salts from the soil $(A)$. The absorption mechanism is determined by the chemical availability in the soil solution,not by the biological function of nitrogen. Therefore,$R$ is not the correct explanation of $A$.

Column-$I$	Column-$II$
$(A)$ Photolysis of water	$(1)$ Zinc
$(B)$ Diazotrophy	$(2)$ Copper
$(C)$ Cytochrome-c oxidase	$(3)$ Manganese
$(D)$ Biosynthesis of $IAA$	$(4)$ Molybdenum
	$(5)$ Boron

Column $X$	Column $Y$
$(1)$ Magnesium	$(P)$ Blood clotting
$(2)$ Molybdenum	$(Q)$ Constituent of cysteine amino acid
$(3)$ Calcium	$(R)$ Essential for nitrogen fixation
$(4)$ Sulphur	$(S)$ Activation of enzymes

$A$: Plants absorb nitrogen from the soil in the form of salts.
$R$: Nitrogen is essential for the synthesis of proteins and nucleic acids.

Similar Questions

Assertion : Plants absorb sulphur in the form of sulphate ions.
Reason : Sulphur bacteria are required for the formation of sulphate.

Study the following columns and choose the correct match.
Column-$I$ Column-$II$
$(A)$ Photolysis of water $(1)$ Zinc
$(B)$ Diazotrophy $(2)$ Copper
$(C)$ Cytochrome-c oxidase $(3)$ Manganese
$(D)$ Biosynthesis of $IAA$ $(4)$ Molybdenum
$(5)$ Boron

Select the mismatch.

For the limited nitrogen that is present in the soil,microbes compete with

Select the correct match for $X$ and $Y$.
Column $X$ Column $Y$
$(1)$ Magnesium $(P)$ Blood clotting
$(2)$ Molybdenum $(Q)$ Constituent of cysteine amino acid
$(3)$ Calcium $(R)$ Essential for nitrogen fixation
$(4)$ Sulphur $(S)$ Activation of enzymes

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$A$: Plants absorb nitrogen from the soil in the form of salts.$R$: Nitrogen is essential for the synthesis of proteins and nucleic acids.