Chemistry - Biomolecules
Practise 9 NEST (NISER) previous year questions on Biomolecules, compiled from papers spanning 2012 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEST (NISER) tests.
Biomolecules has been asked in 7 of the 16 years of NEST (NISER) papers analysed (2011–2026), with 11 questions in all. 27% of them were easy, 55% moderate and 18% tough. Most of its questions came from 2025, with 3 questions that year. In the last three years (2024–2026) it had 5 questions across 4 papers, about 1.3 per paper.
The chapter's 7 topics are not weighted equally: Disaccharides and Polysaccharides (3 questions, 27%), Carbohydrates (2 questions, 18%), and Properties and Preparation of Amino Acids (2 questions, 18%) have been asked the most. Disaccharides and Polysaccharides has also led over the last five years, with 2 questions. Disaccharides and Polysaccharides has produced the most tough questions (1).
- 1Maltose, a disaccharide, contains glycosidic linkage between2025Disaccharides and Polysaccharides
- 2Glucose on treatment with bromine water yields . upon treatment with excess of acetic anhydride yields . The structure of is2024 (Session 1)Preparation and Reactions of Glucose
- 3The amino acid whose aqueous solution turns red litmus blue is2024 (Session 2)Properties and Preparation of Amino Acids
- 4In an aqueous solution, glucose exists in cyclic and open-chain forms, in equilibrium, as shown below. Glucose solution does not give positi2023 (Session 2)Carbohydrates
- 5The polysaccharide that is used as a storage molecule in animals is2022 (Session 1)Disaccharides and Polysaccharides
- 6The anti-COVID-19 drug 2-DG is recently developed by the Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Dev2021 (Session 1)Drugs and It's Classification
- 7The structure of a disaccharide M (molecular mass 342) is given below. Hydrolysis of the disaccharide gives two monosaccharides X and Y . Ac2017Disaccharides and Polysaccharides
- 8A mixture of two isomeric pentoses on reaction with hydroxylamine gives 5 millimoles of a mixture of oximes. The same mixture of pentoses on2012Carbohydrates
- 9The structure of the most predominant species present in the aqueous solution of serine (a natural amino acid) at pH 1 is2012Properties and Preparation of Amino Acids
Frequently Asked Questions
1.How many questions are available for Biomolecules?
This chapter includes 9 questions compiled from NEST (NISER) papers spanning 2012 to 2025.
2.Are these questions only from NEST (NISER), or from other exams too?
These are NEST (NISER) questions specifically for the Biomolecules chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Biomolecules an important chapter for NEST (NISER) Chemistry?
Biomolecules has appeared in 7 of the 16 years of NEST (NISER) papers covered here, with 9 questions across 8 papers - about one per paper it appears in.
4.What is the difficulty level of Biomolecules questions in NEST (NISER)?
Of the 11 questions analysed for this chapter, 27% are easy, 55% moderate and 18% tough. 2025 had the most, with 3 questions.
5.Which topics in Biomolecules should I focus on?
These topics have carried the most weightage in Biomolecules:
- Disaccharides and Polysaccharides - 3 questions (27%)
- Carbohydrates - 2 questions (18%)
- Properties and Preparation of Amino Acids - 2 questions (18%)
- Disaccharides and Polysaccharides has produced the most tough questions (1).
6.Is Biomolecules's weightage in NEST (NISER) going up or down?
Across all 8 papers analysed, Biomolecules has averaged about 1.1 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.