Building Biomolecule Models — NEET Biology

Correct answer: A — A-iii, B-iv, C-ii, D-i, E-v

Let's match the items from COLUMN I with their correct descriptions in COLUMN II based on the NCERT text: A. Amino acids: "Amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon i.e., the α-carbon." So, A matches with iii. B. Lipids: "Lipids are generally water insoluble... these membrane fragments in the form of vesicles get separated along with the acid insoluble pool and hence in the macromolecular fraction." So, B matches with iv. C. Nucleic Acids: "The other type of macromolecule that one would find in the acid insoluble fraction of any living tissue is the nucleic acid. These are polynucleotides... For nucleic acids, the building block is a nucleotide." So, C matches with ii. D. Polysaccharides: "Polysaccharides are long chains of sugars... containing different monosaccharides as building blocks. For example, cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide i.e., glucose." So, D matches with i (hydrolysed to monosaccharides). E. Ash: "What is remaining is called ‘ash’. This ash contains inorganic elements (like calcium, magnesium etc)." So, E matches with v. Therefore, the correct match is A-iii, B-iv, C-ii, D-i, E-v. The final answer is A. Recap: This question tests the understanding of fundamental characteristics and definitions of various biomolecules and fractions discussed in the chapter, including amino acids, lipids, nucleic acids, polysaccharides, and ash.