Small Biomolecules & Industrial Applications — NEET Biology
📚 Practice ConceptFind and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.
Which of the above statements are NOT correct? S1: The acid-soluble pool consists of small biomolecules with molecular weights typically ranging from 18 to around 800 Daltons. S2: Proteins, nucleic acids, and polysaccharides are the only organic compounds found in the acid-insoluble fraction. S3: Lipids are classified as true biomacromolecules because their molecular weight inherently exceeds 1000 Daltons. S4: The acid-insoluble fraction represents roughly the cytoplasmic composition, including both micromolecules and macromolecules. S5: The disruption of cell membranes during grinding leads to the formation of water-insoluble vesicles, causing lipids to separate into the acid-insoluble pool.
View solution & NCERT explanation
Correct answer: B — S2, S3 and S4 only
Statement S1 is correct. The acid-soluble pool contains biomolecules with molecular weights ranging from 18 to approximately 800 Daltons, categorizing them as micromolecules. Statement S2 is incorrect. The acid-insoluble fraction includes four types of organic compounds: proteins, nucleic acids, polysaccharides, and lipids. Statement S3 is incorrect. Lipids are small molecular weight compounds, generally not exceeding 800 Daltons, and are therefore not strictly considered biomacromolecules. Statement S4 is incorrect. The acid-soluble pool roughly represents the cytoplasmic composition (micromolecules), while macromolecules from the cytoplasm and organelles constitute the acid-insoluble fraction. Statement S5 is correct. When living tissue is ground, cell membranes are disrupted into pieces, forming water-insoluble vesicles. These vesicles cause lipids to get separated along with the acid-insoluble pool. Therefore, statements S2, S3, and S4 are NOT correct.
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Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.