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Chemistry - Biomolecules

Practise 43 KCET previous year questions on Biomolecules, compiled from papers spanning 2007 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty KCET tests.

Biomolecules has been asked in 19 of the 20 years of KCET papers analysed (2007–2026), with 43 questions in all. 60% of them were easy, 35% moderate and 5% tough. Most of its questions came from 2026, with 3 questions that year. In the last three years (2024–2026) it had 7 questions across 3 papers, about 2.3 per paper.

The chapter's 8 topics are not weighted equally: Vitamins (9 questions, 21%), Properties and Preparation of Amino Acids (7 questions, 16%), and Nucleic Acids (7 questions, 16%) have been asked the most. Over the last five years the most frequent topics have been Carbohydrates (3), Properties and Preparation of Amino Acids (2), and Vitamins (2). Vitamins has produced the most tough questions (1).

  1. 1Match List-I with List-II List-I (Vitamins) List-II (Deficiency Diseases) (a) (i) Convulsions (b) (ii) RBC deficiency in haemoglobin (c) (ii2026Vitamins
  2. 2Consider the following statements: Statement-I: All monosaccharides are reducing sugars. Statement-II: Sucrose can reduce ammoniacal silver 2026Carbohydrates
  3. 3Incorrect statement about -amino acids of proteins among the following is2026Properties and Preparation of Amino Acids
  4. 4Match List-I with List-II for the following reaction pattern Glucose Product Structural prediction {array}{|l|l|l|l|} & {List - I (Reagents)2025Preparation and Reactions of Glucose
  5. 5The correct sequence of -amino acids, hormone, vitamin, carbohydrates respectively is2025Properties and Preparation of Amino Acids
  6. 6Which examples of carbohydrates exhibit -link, ( -glycosidic link) in their structure?2025Disaccharides and Polysaccharides
  7. 7The type of linkage present between nucleotides is2024Nucleic Acids
  8. 8Sucrose is dextrorotatory but after hydrolysis the mixture show laevorotation, this is because of2023Carbohydrates
  9. 9The correct order of match between column and column is2023Vitamins
  10. 10Thyroxine produced in the thyroid gland is an iodinated derivative of2023Proteins
  11. 11Which institute has approved the emergency use of 2-deoxy-D-glucose as additive therapy for COVID-19 patients?2022Carbohydrates
  12. 12A nucleic acid, whether DNA or RNA gives on complete hydrolysis, two purine bases, two pyrimidine bases, a pentose sugar and phosphoric acid2022Nucleic Acids
  13. 13RNA and DNA are chiral molecules, their chirality is due to the presence of2021Nucleic Acids
  14. 14Primary structure in a nucleic acid contains bases as GATGC ... The chain which is complementary to this chain is2021Nucleic Acids
  15. 15Which one of the following vitamins is not stored in adipose tissue?2020Vitamins
  16. 16Hypothyroidism is caused by the deficiency of2020Vitamins
  17. 17glycosidic bond is not found in2020Disaccharides and Polysaccharides
  18. 18The vitamin that helps in clotting of blood is2019Vitamins
  19. 19In nucleic acids, the nucleotides are joined together by2019Nucleic Acids
  20. 20Which of the following is generally water insoluble?2019Vitamins
  21. 21The two forms of D-Glucopyranose are called2018Carbohydrates
  22. 22The glycosidic linkage involved in linking the glucose units in amylose part of starch is2018Disaccharides and Polysaccharides
  23. 23Which of the following bases is not present in DNA?2018Nucleic Acids
  24. 24The standard reduction potential at for the following half cell reaction Which of the following is strongest reducing agent ?2017Preparation and Reactions of Glucose
  25. 25Select wrong chemical reaction among thefollowing:2017Hormones
  26. 26Cannizzaro's reaction is an example of auto oxidation2017Vitamins
  27. 27Which of the following gives positive Fehling's solution test?2016Preparation and Reactions of Glucose
  28. 28Which of the following is correct about H-bonding in DNA?2016Nucleic Acids
  29. 29Glycogen is2015Disaccharides and Polysaccharides
  30. 30Which one of the following is an essential amino acid.2015Properties and Preparation of Amino Acids
  31. 31Cheilosis and digestive disorders are due to the deficiency of2015Vitamins
  32. 32Impure copper containing Fe, Au, Ag as impurities is electrolytically refined. A current of \( 140 {~A} \) for \( 482.5 {~s} \) decreased th2014Carbohydrates
  33. 33Glucose when reduced with HI and red phosphorus gives2013Preparation and Reactions of Glucose
  34. 34The number of disulphide linkages present in insulin are2013Hormones
  35. 35Sucrose is not a reducing sugar since2012Disaccharides and Polysaccharides
  36. 36-maltose consists of2011Disaccharides and Polysaccharides
  37. 37In an alkaline medium, glycine predominantly exists as/in a/an2011Properties and Preparation of Amino Acids
  38. 38The letter ' ' in D-glucose signifies2010Carbohydrates
  39. 39In alkaline medium, alanine exists predominantly as2010Properties and Preparation of Amino Acids
  40. 40A diabetic person carries a packet of glucose with him always, because2009Preparation and Reactions of Glucose
  41. 41There are 20 naturally occurring amino acids. The maximum number of tripeptides that can be obtained is2009Properties and Preparation of Amino Acids
  42. 42The amino acid which is not optically active is2007Properties and Preparation of Amino Acids
  43. 43A metal present in vitamin is2007Vitamins

Frequently Asked Questions

1.How many questions are available for Biomolecules?

This chapter includes 43 questions compiled from KCET papers spanning 2007 to 2026.

2.Are these questions only from KCET, or from other exams too?

These are KCET 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 KCET Chemistry?

Biomolecules has appeared in 19 of the 20 years of KCET papers covered here, with 43 questions across 19 papers - about 2 per paper it appears in.

4.What is the difficulty level of Biomolecules questions in KCET?

Of the 43 questions analysed for this chapter, 60% are easy, 35% moderate and 5% tough. 2026 had the most, with 3 questions.

5.Which topics in Biomolecules should I focus on?

These topics have carried the most weightage in Biomolecules:

  • Vitamins - 9 questions (21%)
  • Properties and Preparation of Amino Acids - 7 questions (16%)
  • Nucleic Acids - 7 questions (16%)
  • Vitamins has produced the most tough questions (1).
6.Is Biomolecules's weightage in KCET going up or down?

Across all 19 papers analysed, Biomolecules has averaged about 2.3 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 2.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.