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Chemistry - Biomolecules

Practise 57 AIIMS previous year questions on Biomolecules, compiled from papers spanning 2002 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Biomolecules has been asked in 17 of the 19 years of AIIMS papers analysed (2001–2019), with 57 questions in all. 56% of them were easy, 30% moderate and 14% tough. Most of its questions came from 2019, with 8 questions that year. In the last three years (2017–2019) it had 12 questions across 5 papers, about 2.4 per paper.

The chapter's 8 topics are not weighted equally: Carbohydrates (14 questions, 25%), Properties and Preparation of Amino Acids (12 questions, 21%), and Proteins (11 questions, 19%) have been asked the most. Properties and Preparation of Amino Acids has produced the most tough questions (3).

  1. 1Select the correct set of answer.26 May, 2019Properties and Preparation of Amino Acids
  2. 2Assertion : -Bromotoluene can be prepared from -toluidine. Reason : Amino group is meta-directing.26 May, 2019Properties and Preparation of Amino Acids
  3. 3Assertion: Two sugar units are joined by 1,2-glycosidic bond in sucralose. Reason : Sucralose contains -glucose and -fructose glycosidic bon26 May, 2019Preparation and Reactions of Glucose
  4. 4Assertion : Glyceraldehyde reacts with to form achiral compound. Reason : and both are oxidised.26 May, 2019Preparation and Reactions of Glucose
  5. 5Assertion :Adjacent monosaccharides are held by glycosidic bonds to form polysaccharides. Reason : Monosaccharides cannot be hydrolysed furt26 May, 2019Carbohydrates
  6. 6Assertion : Glucose does not give 2, 4-DNP test. Reason : Glucose exists in cyclic hemiacetal form.25 May, 2019Carbohydrates
  7. 7Nucleosides are25 May, 2019Nucleic Acids
  8. 8Two alleles of the same gene possess chemical variation of25 May, 2019Nucleic Acids
  9. 9Assertion : Oxidation of glucose by -water gives saccharic acid. Reason : -water oxidises and -OH group.27 May, 2018Preparation and Reactions of Glucose
  10. 10Which of the following sets of amino acids contains only essential amino acids?26 May, 2018Properties and Preparation of Amino Acids
  11. 11Which of the following statements is incorrect?26 May, 2018Disaccharides and Polysaccharides
  12. 12Assertion: Nucleotides are phosphate esters of nucleosides. Reason: The various nucleotides in nucleic acids are linked either through purin2017Nucleic Acids
  13. 13Preview not available - open to view this question.2016Preparation and Reactions of Glucose
  14. 14Assertion : A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of a little hydrochloric acid, it becomes la2016Disaccharides and Polysaccharides
  15. 15Identify the given structure.2016Nucleic Acids
  16. 16Assertion : Carbohydrates are more suitable for the production of energy in the body than proteins and fats. Reason: Carbohydrates can be st2016Carbohydrates
  17. 17Lysine is least soluble in water in the range2015Properties and Preparation of Amino Acids
  18. 18Thymine is2015Nucleic Acids
  19. 19'Tocopherol' is the chemical name of2015Vitamins
  20. 20Assertion : Solubility of proteins is minimum at the isoelectric point. Reason : At isoelectric point, protein molecule behaves as a zwitter2015Properties and Preparation of Amino Acids
  21. 21Maltose is made of the units2014Disaccharides and Polysaccharides
  22. 22Assertion : Insulin is water soluble. Reason: Insulin is a globular protein.2014Proteins
  23. 23Which of the following options consist of non-essential amino acids only?2014Properties and Preparation of Amino Acids
  24. 24Which of the following is a non-reducing sugar?2013Carbohydrates
  25. 25Assertion : All enzymes are made up of proteins and all proteins have three dimensional structures. Reason : Secondary structures of protein2013Proteins
  26. 26Assertion : Glutamine contains amide group. Reason : Isoelectric point of glutamine is 7 .2013Properties and Preparation of Amino Acids
  27. 27If phthalic acid is treated with and then it is first heated weakly then strongly, the final product formed is2012Properties and Preparation of Amino Acids
  28. 28Which of the following is a homopolysaccharide?2012Carbohydrates
  29. 29Find the hydrolysis product when a phosphodiester bond of nucleotide breaks.2011Nucleic Acids
  30. 30Find the hydrolysis product of maltose.2011Disaccharides and Polysaccharides
  31. 31Assertion : -pleated sheet structure of protein shows maximum extension. Reason : Intermolecular hydrogen bonding is present in them.2011Proteins
  32. 32Assertion : Fructose is a reducing sugar. Reason : It has a ketonic group.2011Carbohydrates
  33. 33Assertion : Millon's test is a test for identification of proteins. Reason : Millon's reagent is a solution of mercurous nitrate and mercuri2009Proteins
  34. 34Which of the following sugars is not found in plants?2009Carbohydrates
  35. 35Jute fibres deteriorate quickly because2009Carbohydrates
  36. 36Prolonged exposure of fat or oil in moist air and light causes bad smell (rancidity). It is due to2008Fats
  37. 37Assertion : Alpha \(( )\)-amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Rea2007Properties and Preparation of Amino Acids
  38. 38A child took sugar cane and sucked its juice. Regarding this which of the following match is correct?2007Carbohydrates
  39. 39Assertion : Vegetable oils are fats which are present in plant cells in soluble form. Reason : Vegetable oils occur only in cells of embryo.2007Carbohydrates
  40. 40Reason : The latex contains long chain hydrocarbons. Assertion : Petroplants produce large amount of latex.2007Carbohydrates
  41. 41The pair in which both species have iron is2006Proteins
  42. 42Among the following L-serine is2006Properties and Preparation of Amino Acids
  43. 43Thymine is2006Properties and Preparation of Amino Acids
  44. 44Lysine is least soluble in water in the range2006Properties and Preparation of Amino Acids
  45. 45Methyl- -D-glucoside and methyl- -D-glucoside are2006Disaccharides and Polysaccharides
  46. 46Which one of the following biomolecules is insoluble in water?2005Proteins
  47. 47Which one of the following statements is true for protein synthesis (translation)?2005Proteins
  48. 48Assertion : Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis. Reason : Maltose has a 1,4- -glycosidic linkage.2005Carbohydrates
  49. 49The nucleic acid base having two possible binding sites is2004Proteins
  50. 50Assertion : Carboxypeptidase is an exopeptidase. Reason : It cleaves the N-terminal bond.2004Proteins

Frequently Asked Questions

1.How many questions are available for Biomolecules?

This chapter includes 57 questions compiled from AIIMS papers spanning 2002 to 2019.

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

These are AIIMS questions specifically for the Biomolecules chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Biomolecules an important chapter for AIIMS Chemistry?

Biomolecules has appeared in 17 of the 19 years of AIIMS papers covered here, with 57 questions across 19 papers - about 3 per paper it appears in.

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

Of the 57 questions analysed for this chapter, 56% are easy, 30% moderate and 14% tough. 2019 had the most, with 8 questions.

5.Which topics in Biomolecules should I focus on?

These topics have carried the most weightage in Biomolecules:

  • Carbohydrates - 14 questions (25%)
  • Properties and Preparation of Amino Acids - 12 questions (21%)
  • Proteins - 11 questions (19%)
  • Properties and Preparation of Amino Acids has produced the most tough questions (3).
6.Is Biomolecules's weightage in AIIMS going up or down?

Across all 19 papers analysed, Biomolecules has averaged about 3.0 questions per paper. In the last three years (2017–2019), that average has fallen, at about 2.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.