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Question

Study the given statements and select the correct answer.


(I) Lipids are macromolecules but obtained under-macromolecular fraction due to their insoluble nature in the aqueous medium of a cell.
(II) Water is the most abundant chemical in a living organism.
(III) The first respiratory substrate is lipid.
(IV) Dihydroxyacetone occurs in d and l form.

A
I, II and IV are correct
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B
I, II & III are correct
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C
I, II are correct
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D
III and IV are correct
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Solution

The correct option is A I, II and IV are correct
(I) Lipids are micromolecules as they are not polymers. These are monomers made up of three fatty acids attached to a glycerol. Because these are hydrophobic, they are obtained under the macromolecule fraction.
(II) Water is the most abundant chemical in the living organism.
(III) Glucose acts as the first respiratory substrate.
(IV) Dihydroxyacetone occurs in both the D and L form.
Hence, the correct answer is 'I, II and IV are correct'

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