Assertion: Some essential elements are called structural element of cells Reason: These essential elements are the components of certain biomolecules.A. If both assertio and reason are true and reason is the correct explanation of assertionB. if both assertion and reason are true but reason is not the correct explanation of assertionC. if assertion is true but reason is falseD. if both assertion and reason are false

Assertion: Some essential elements are called structural element of ce

1.	Assertion: Some essential elements are called structural element of cells Reason: These essential elements are the components of certain biomolecules.A. If both assertio and reason are true and reason is the correct explanation of assertionB. if both assertion and reason are true but reason is not the correct explanation of assertionC. if assertion is true but reason is falseD. if both assertion and reason are false
Answer» Correct Answer - A Some essential elements plays a structural role in plants. These essential elements are carbon, hydrogen, oxygen and nitrogen. They are building blocks of macromolecules that form the bulk of plant body carbon and hydrogen are components of all organic substances. many of them also contain oxytgen nitrogen is a constituent of amino acids, proteins, nucleic acids, chlorophyll, auxin, cytokinins and vitamins.

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Nitrogenase enzyme isA. sensitive to moleculer oxygenB. only present in prokaryotesC. present within the bacteroidsD. all of the above
Activity of nitrogenase enzyme depends onA. non-availability of ATPB. availability of nitric acidC. availability of ATPD. non-availability of nitric acid
A plant requires nitrogen and sulphur for itsA. cell wallsB. storage vacuolesC. enzymesD. energy stores
Name the mineral element that is component of ATP molecules.
How many ATP are required for the formation of one molecule of `NH_3 ` by the nitrogenase enzyme ?A. SixB. EightC. TwelvD. Sixteen
The major role of phosphorus in plant metabolism isA. O_(2) evolution during photosynthesisB. CO_(2) evolution during respirationC. create anaerobic conditionsD. generate metabolic energy
The given equation refers to ` N_ 2 + 8 e ^(-) + 16 ATP to 2NH_ 3 + H_ 2 + 16ADP + 16P_i`A. AmmonificationB. NitrificationC. DenitificationD. Nitrogen fixation
Presence of phosphorus in a plantA. Brings about healthy root growthB. Retards fruit ripeningC. Retards protein formationD. None of the above
On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves apeared first inA. old leavesB. young leavesC. young leaves folowed by mature leaveD. mature leaves followed by young leaves
On the basis of symtoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if yellowing of leaves appeared first inA. Young leavesB. Old leavesC. Young leaves followed by old leavesD. Old leaver followed by young leaves

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