Macromolecules and Micromolecules — NEET Biology
✅ Asked in NEET 2026The acid insoluble fraction, has only four types of organic compounds i.e., proteins, nucleic acids, polysaccharides and lipids. These classes of compounds with the exception of lipids, have molecular weights in the range of ten thousand daltons and above. For this very reason, biomolecules, i.e., chemical compounds found in living organisms are of two types. One, those which have molecular weights less than one thousand dalton and are usually referred to as micromolecules or simply biomolecules while those which are found in the acid insoluble fraction are called macromolecules or biomacromolecules.
NEET tests your understanding of biomolecule classification based on molecular weight. The acid-insoluble fraction contains only four organic compounds: proteins, nucleic acids, polysaccharides, and lipids. Molecules under 1000 daltons are micromolecules; those above 10,000 daltons (except lipids) are macromolecules. Students often confuse lipids with macromolecules because they appear in the acid-insoluble fraction—remember, lipids have lower molecular weights despite being acid-insoluble. The key to avoiding mistakes: memorize the 1000 and 10,000 dalton cutoffs, and note that lipids are the exception to the macromolecule rule. This concept is fundamental to understanding biochemistry and appears frequently in comparative questions.
Identify the correct statements about biomolecules. A. Lipids are generally water soluble. B. Proteins are polypeptides. C. Polysaccharides are long chains of sugars. D. Adenine and guanine are substituted pyrimidines. E. Almost all enzymes are proteins.
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.