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Sunday, 25 October

JEE Main · Chemistry · Class 12

Biomolecules: JEE Main previous year questions

122 questions in 104 of the 108 JEE Main shifts Lumi analysed, asked in 8 of 8 years. Here is what this chapter tests and how.

Study this chapter
Questions
122
in 104 of 108 shifts · 8 of 8 years
Average a shift
1.0
of 25 Chemistry · 1.2 since 2024 +0.3
Typical range
0.8–1.4
questions a shift; fewest 0.8, most 1.4
Weighted estimate
1.2
model, recent years count more · about 5 marks
  • Typical range (fact)
  • Average a shift (fact)
  • Weighted estimate (model)

Questions are counted per shift, out of the 25 each subject has, in the shifts Lumi analysed; papers that offered 30 a subject (2017, 2021–2024) are scaled to 25. Typical range: the middle six of the eight years (2017, 2020–2026), leaving out the single highest and lowest year. The average and the range are historical fact. The weighted estimate is a model: each year's share, with recent years counting more (half-life three years), and chapters NTA dropped from the syllabus set near zero. It is a guide to effort, not a forecast of the paper.

What to do

How to spend time on Biomolecules

Priority

Should do

One of the 6 Chemistry chapters that took Chemistry from half to 80% of its questions in the 108 shifts analysed. How bands are set

Past questions
122in 104 of 108 shifts
Study plan gives it
17 hover 12 months; 13 h over 6
Study this chapter →

Ideas asked most often

  1. Reducing vs Non-reducing Sugars4×
  2. Selective Oxidation of Monosaccharides4×
  3. Maltose Structure and Linkage4×
  4. Sucrose Structure and Linkage4×
  5. Anomers and Epimers3×

8 of the 38 ideas in Lumi’s map of this chapter have not been asked or touched in the shifts analysed. Of its idea-tagged questions from 2024 on, 14% tested an idea not asked in an earlier year, so learn the whole chapter, not just the list above.

Within each subject, chapters in NTA's 2026 syllabus are ranked by their average questions a shift over all 8 years analysed (history, not the model). Going down that list, the chapters that together held the first half of the subject's questions are Must do; the next ones, up to 80%, are Should do; the rest are Lower priority.

Key findings

Biomolecules at a glance

  1. 01

    86%

    of its 14 questions from 2024 on that Lumi matched to an idea tested one JEE Main had asked in an earlier year; 100% came from a topic asked in an earlier year.

  2. 02

    21%

    of the 38 ideas in Lumi's map of the chapter have not been asked or touched on in the shifts analysed.

  3. 03

    16%

    of its questions asked for a numerical answer, 0.5 times the Chemistry average.

  4. 04

    5%

    of its questions were rated hard, against 6% across all Chemistry questions in the same shifts.

Questions a shift, year by year

Out of the 25 Chemistry questions in a shift. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift.

0240.8’170.9’201’210.9’220.9’230.8’241.4’251.4’26

Raw count: 2017: 1 in 1 shift · 2020: 11 in 12 shifts · 2021: 29 in 24 shifts · 2022: 26 in 24 shifts · 2023: 13 in 12 shifts · 2024: 18 in 18 shifts · 2025: 11 in 8 shifts · 2026: 13 in 9 shifts.

Kind of question

SHARE OF QUESTIONS
  • Recall, single correct41%
  • Numerical answer16%
  • Diagram based13%
  • Match the list12%
  • Two statements6%
  • Multi-step4%
  • Conceptual4%
  • Application3%
  • Assertion–reason2%

Most common asks: definition recall (6); match list on vitamin and name (2); predict product of reaction (2).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all JEE chapters
#23
of 70 by weighted estimate
Rank in Chemistry
#10
of 21 chapters
Share of Chemistry
4.1%
of its questions, all shifts analysed
Busiest year
2025
1.4 questions a shift
Year to year
Steady
varies by about 0.2 questions a shift
Long-run direction
+0.06
questions a shift, per year
Easy questions
57%
5% rated hard
Numerical answer
16%
0.5× the Chemistry rate
With a figure
21%
graph, diagram or structure
Study time
17 h
13 h on a 6-month plan
Marks per study hour
0.29
#2 of 70 chapters
Foundation for others
22%
of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard. Each bar is that year’s split, so years compare directly; the number is the questions in that year’s analysed shifts (1 to 24 shifts a year).

  • 20171
  • 202011
  • 202129
  • 202226
  • 202313
  • 202418
  • 202511
  • 202613
  • Easy
  • Medium
  • Hard

What it asks you to do

SHARE OF QUESTIONS
  • Recall64%
  • Conceptual10%
  • Multi-step8%
  • Diagram reading7%
  • Application7%
  • Calculation4%

Coverage

How much of the chapter JEE Main has used

We split the chapter into 38 ideas. In the 108 shifts analysed, JEE Main built a question around 25 of them. 34% of the chapter has never been the main idea of a question, so past questions alone leave part of it out.

Asked as the main idea
25
Touched on in a question
5
Never asked
8

Topics

What repeats, topic by topic

This chapter's questions per topic in each year's analysed shifts. The number is the count; the shade is scaled to one shift, so a year with more analysed shifts (1 to 24 a year) does not look darker. 70 questions had no close topic in Lumi's map and count for the chapter only.

’17’20’21’22’23’24’25’26
013+questions in that year’s analysed shifts, shaded per shift
  • Carbohydrates

    As a topic: 50 questions in 8 of 8 years, most often single correct, 2% numerical answer.

  • Mole Concept

    As a topic: 80 questions in 8 of 8 years, most often numerical value, 65% numerical answer. Recent asks: match list on atoms in given masses; statement I/II on mole fraction and Raoult deviation; empirical formula from mass percentage.

  • Stereoisomerism

    As a topic: 25 questions in 7 of 8 years, most often numerical value, 56% numerical answer.

Drill down

Topic, idea, question

Open a topic to see every idea JEE Main tested inside it, then open an idea to read the questions. Each row shows its 8 years.

  • Open50 · 41%713123626

    25 ideas inside

    • OpenRepeated4 · 8%2
    • OpenRepeated4 · 8%
    • OpenRepeated4 · 8%2
    • OpenRepeated4 · 8%22
    • OpenRepeated3 · 6%2
    • OpenRepeated3 · 6%
    • OpenRepeated3 · 6%2
    • OpenRepeated3 · 6%2
    • OpenRepeated2 · 4%
    • OpenRepeated2 · 4%
    • OpenRepeated2 · 4%
    • OpenRepeated2 · 4%
    • Open2 · 4%2
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
    • Open1 · 2%
  • Open1 · 1%
  • Open1 · 1%

Squares are the 8 years with analysed shifts, 2017 to 2026. A number is the questions that year when there is more than one; the shade is scaled to one shift, so a year with more analysed shifts (1 to 24 a year) does not look darker. Share is of the level above.

Ideas

The exact ideas JEE Main has asked

Inside the topics, 26 different ideas were tested; 13 came more than once. These are the repeats, then the ideas new since 2024.

Dots are the 8 years with analysed shifts, 2017 to 2026.

Every question

All 122 Biomolecules questions

Newest first, shift by shift. The newest 40 show their opening words; older ones name the idea they tested. Each opens with its options and the official answer.

JEE Main 202613 questions

  1. 2 Apr 2026, Shift 1 · Q69Match List - I with List - II. List - I (Vitamin) : A. Vitamin B1\mathrm{B_1} B. Vitamin B2\mathrm{B_2} C. Vitamin B6\mathrm{B_6} D.…EasyMatch the list
  2. 2 Apr 2026, Shift 2 · Q69Identify the correct pair having amino acid (A) and the hormone (B) that is iodinated derivative of the amino acid (A). (T and Y represent…EasySingle correct
  3. 4 Apr 2026, Shift 1 · Q68Given below are two statements: Statement I: The structure of Maltose is given below: [structure of maltose: two glucopyranose rings…EasyTwo statementsHas a figure
  4. 4 Apr 2026, Shift 1 · Q69Match the LIST-I with LIST-II List-I (Name of amino acid): A. Arginine; B. Aspartic acid; C. Lysine; D. Glutamic acid List-II (One letter…MediumMatch the list
  5. 4 Apr 2026, Shift 2 · Q68A D-aldotetrose on oxidation with concentrated HNO3\mathrm{HNO_3} resulted in optically inactive dicarboxylic acid. The structure of the…MediumDiagram basedHas a figure
  6. 5 Apr 2026, Shift 1 · Q69Identify the correct statements. A. Glucose exists in two anomeric forms. B. Anomers of glucose differ in configuration at C-1 in cyclic…MediumOther
  7. 5 Apr 2026, Shift 2 · Q68Identify the incorrect statement about tertiary structure of proteins.EasySingle correct
  8. 5 Apr 2026, Shift 2 · Q69Given below are two statements : Statement I : [figure: two ring (pyranose) structures, each with CH2_2-OH, ring O, H, OH and H…MediumTwo statementsHas a figure
  9. 6 Apr 2026, Shift 1 · Q69Match the LIST-I with LIST-II List-I (Deficiency Disease) | List-II (Vitamin) A. Scurvy | I. Pyridoxine B. Convulsions | II. Vitamin A C.…EasyMatch the list
  10. 6 Apr 2026, Shift 1 · Q70Match the LIST-I with LIST-II List-I (Amino acid) | List-II (Positive reaction/Test for functional group present in side chain of amino…MediumMatch the list
  11. 6 Apr 2026, Shift 2 · Q69Consider the following reactions. Total number of electrons in the π\pi bonds and lone pair of electrons in the product (X) is : [figure:…HardSingle correctHas a figure
  12. 8 Apr 2026, Shift 2 · Q69The incorrect statement from the following with respect to carbohydrates is :EasySingle correct
  13. 8 Apr 2026, Shift 2 · Q70Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution ?EasySingle correct

JEE Main 202511 questions

  1. 2 Apr 2025, Shift 1 · Q70Identify the correct statement among the following :MediumSingle correct
  2. 2 Apr 2025, Shift 1 · Q750.1 mol of the following given antiviral compound (P) will weigh ___________ ×10−1\times10^{-1} g (nearest integer). (Given : molar mass in…MediumNumerical valueHas a figure
  3. 2 Apr 2025, Shift 2 · Q70A tetrapeptide, xx on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion…EasySingle correct
  4. 3 Apr 2025, Shift 1 · Q70Which of the following is the correct structure of L−-Fructose?MediumDiagram basedHas a figure
  5. 3 Apr 2025, Shift 2 · Q58Given below are two statements: Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to…MediumTwo statements
  6. 3 Apr 2025, Shift 2 · Q70Fat soluble vitamins are: A. Vitamin B1\mathrm{B_1} B. Vitamin C C. Vitamin E D. Vitamin B12\mathrm{B_{12}} E. Vitamin K Choose the correct…EasyOther
  7. 4 Apr 2025, Shift 2 · Q70A dipeptide, "x" on complete hydrolysis gives "y" and "z". "y" on treatment with aq. HNO2\mathrm{HNO_2} produces lactic acid. On the other…MediumSingle correctHas a figure
  8. 7 Apr 2025, Shift 1 · Q70Given below are two statements: Statement I: D-(+)-glucose + D-(+) fructose →−H2O\xrightarrow{-H_2O} Sucrose sucrose…MediumTwo statements
  9. 7 Apr 2025, Shift 1 · Q75Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is ______%. (nearest integer) (Given molar mass in…EasyNumerical valueHas a figure
  10. 7 Apr 2025, Shift 2 · Q70Given below are two statements : Statement (I) : On hydrolysis, oligo peptides give rise to fewer number of α\alpha-amino acids while…EasyTwo statements
  11. 8 Apr 2025, Shift 2 · Q70[structure: valine, H2N−CH(CH(CH3)2)−COOH\mathrm{H_2N-CH(CH(CH_3)_2)-COOH}; an arrow from it splits into A at pH = 2 and B at pH = 10] Choose the correct…MediumSingle correctHas a figure

JEE Main 202418 questions

  1. 4 Apr 2024, Shift 1 · Q80Which of the following is the correct structure of L-Glucose ?MediumDiagram basedHas a figure
  2. 4 Apr 2024, Shift 2 · Q80Match List I with List II LIST I A. α\alpha - Glucose and α\alpha - Galactose B. α\alpha - Glucose and β\beta - Glucose C. α\alpha -…MediumMatch the list
  3. 5 Apr 2024, Shift 1 · Q80Which of the following gives a positive test with ninhydrin ?EasySingle correct
  4. 5 Apr 2024, Shift 2 · Q80Coagulation of egg, on heating is because of :EasySingle correct
  5. 6 Apr 2024, Shift 1 · Q80DNA molecule contains 4 bases whose structure are shown below. One of the structures is not correct, identify the incorrect base structure.MediumDiagram basedHas a figure
  6. 6 Apr 2024, Shift 2 · Q80The incorrect statements regarding enzymes are : (A) Enzymes are biocatalysts. (B) Enzymes are non-specific and can catalyse different…EasyOther
  7. 8 Apr 2024, Shift 1 · Q80The incorrect statement regarding the given structure is [figure: Fischer projection: CHO at top; then H-C-OH, HO-C-H, H-C-OH, H-C-OH;…MediumDiagram basedHas a figure
  8. 8 Apr 2024, Shift 2 · Q90The total number of carbon atoms present in tyrosine, an amino acid, is ___________.EasyNumerical value
  9. 9 Apr 2024, Shift 1 · Q90Total number of essential amino acid among the given list of amino acids is ________. Arginine, Phenylalanine, Aspartic acid, Cysteine,…EasyNumerical value
  10. 9 Apr 2024, Shift 2 · Q80The incorrect statement about Glucose is :EasySingle correct
  11. 1 Feb 2024, Shift 1 · Q79If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is :EasySingle correct
  12. 1 Feb 2024, Shift 2 · Q90The number of tripeptides formed by three different amino acids using each amino acid once is ________.EasyNumerical value
  13. 27 Jan 2024, Shift 1 · Q78Two nucleotides are joined together by a linkage known as :EasySingle correct
  14. 29 Jan 2024, Shift 1 · Q78Type of amino acids obtained by hydrolysis of proteins is :EasySingle correct
  15. 30 Jan 2024, Shift 1 · Q78Sugar which does not give reddish brown precipitate with Fehling's reagent, is :EasySingle correct
  16. 30 Jan 2024, Shift 2 · Q89The total number of correct statements, regarding the nucleic acids is ________ A. RNA is regarded as the reserve of genetic information…EasyNumerical value
  17. 31 Jan 2024, Shift 1 · Q79Selective Oxidation of Monosaccharides · Medium · Match the list
  18. 31 Jan 2024, Shift 2 · Q89Open the question · Medium · Numerical value

JEE Main 202313 questions

  1. 6 Apr 2023, Shift 1 · Q63Open the question · Easy · Match the list
  2. 6 Apr 2023, Shift 1 · Q80Open the question · Easy · Match the list
  3. 6 Apr 2023, Shift 2 · Q79Open the question · Easy · Match the list
  4. 8 Apr 2023, Shift 1 · Q77Open the question · Easy · Single correct
  5. 8 Apr 2023, Shift 2 · Q78Open the question · Easy · Match the list
  6. 10 Apr 2023, Shift 1 · Q78Open the question · Easy · Single correct
  7. 10 Apr 2023, Shift 2 · Q79Open the question · Easy · Single correct
  8. 11 Apr 2023, Shift 1 · Q79D and L Configuration of Sugars · Hard · Diagram based · has a figure
  9. 11 Apr 2023, Shift 2 · Q89Reducing vs Non-reducing Sugars · Medium · Numerical value
  10. 12 Apr 2023, Shift 1 · Q89Open the question · Medium · Numerical value
  11. 13 Apr 2023, Shift 1 · Q80Kiliani-Fischer Synthesis · Medium · Single correct
  12. 13 Apr 2023, Shift 2 · Q79Open the question · Medium · Single correct
  13. 15 Apr 2023, Shift 1 · Q79Open the question · Easy · Single correct

JEE Main 202226 questions

  1. 25 Jul 2022, Shift 1 · Q78Open the question · Easy · Single correct
  2. 25 Jul 2022, Shift 2 · Q78Sucrose Structure and Linkage · Easy · Single correct
  3. 26 Jul 2022, Shift 1 · Q79Reducing vs Non-reducing Sugars · Medium · Diagram based · has a figure
  4. 26 Jul 2022, Shift 2 · Q79Structure of Glycogen · Easy · Single correct
  5. 27 Jul 2022, Shift 1 · Q77Open the question · Medium · Single correct
  6. 27 Jul 2022, Shift 2 · Q77Reduction with HI and Red Phosphorus · Medium · Match the list
  7. 28 Jul 2022, Shift 1 · Q78Haworth Projections · Hard · Diagram based · has a figure
  8. 28 Jul 2022, Shift 2 · Q49Carbonyl Addition Reactions in Glucose · Medium · Other · has a figure
  9. 29 Jul 2022, Shift 1 · Q88Open the question · Easy · Numerical value
  10. 29 Jul 2022, Shift 2 · Q79Structure of Amylose · Medium · Assertion–reason
  11. 30 Jul 2022, Shift 2 · Q49Structure of Glycogen · Easy · Two statements
  12. 24 Jun 2022, Shift 1 · Q78Structure of Cellulose · Easy · Single correct
  13. 24 Jun 2022, Shift 2 · Q90Open the question · Easy · Numerical value
  14. 25 Jun 2022, Shift 2 · Q65Open the question · Easy · Match the list
  15. 25 Jun 2022, Shift 2 · Q81Minimum Molar Mass Calculation · Easy · Numerical value
  16. 25 Jun 2022, Shift 2 · Q89Open the question · Medium · Numerical value
  17. 26 Jun 2022, Shift 1 · Q90Open the question · Medium · Numerical value
  18. 26 Jun 2022, Shift 2 · Q62Open the question · Medium · Match the list
  19. 26 Jun 2022, Shift 2 · Q80Open the question · Easy · Single correct
  20. 27 Jun 2022, Shift 1 · Q79Selective Oxidation of Monosaccharides · Hard · Diagram based · has a figure
  21. 27 Jun 2022, Shift 2 · Q78Maltose Structure and Linkage · Easy · Two statements
  22. 28 Jun 2022, Shift 1 · Q79Open the question · Easy · Single correct
  23. 28 Jun 2022, Shift 2 · Q79Sucrose Structure and Linkage · Easy · Single correct
  24. 29 Jun 2022, Shift 1 · Q78Open the question · Easy · Single correct
  25. 29 Jun 2022, Shift 2 · Q78Open the question · Easy · Single correct
  26. 30 Jun 2022, Shift 1 · Q79Open the question · Easy · Single correct

JEE Main 202129 questions

  1. 3 Aug 2021, Shift 1 · Q48Open the question · Medium · Diagram based · has a figure
  2. 3 Aug 2021, Shift 2 · Q50Open the question · Medium · Diagram based · has a figure
  3. 4 Aug 2021, Shift 1 · Q48Open the question · Medium · Single correct
  4. 4 Aug 2021, Shift 1 · Q49Cyclic Structure of Glucose · Easy · Single correct
  5. 4 Aug 2021, Shift 2 · Q49Chemical Evidence for the Cyclic Structure · Medium · Single correct
  6. 26 Aug 2021, Shift 1 · Q47Open the question · Medium · Diagram based · has a figure
  7. 26 Aug 2021, Shift 1 · Q60Open the question · Hard · Numerical value
  8. 26 Aug 2021, Shift 2 · Q49Sucrose Structure and Linkage · Easy · Assertion–reason
  9. 27 Aug 2021, Shift 1 · Q49Open the question · Medium · Diagram based · has a figure
  10. 27 Aug 2021, Shift 2 · Q40Seliwanoff's Test · Medium · Single correct
  11. 27 Aug 2021, Shift 2 · Q49Inversion of Cane Sugar · Easy · Single correct
  12. 31 Aug 2021, Shift 1 · Q50Glycosidic Linkage · Easy · Single correct
  13. 31 Aug 2021, Shift 2 · Q49Open the question · Easy · Single correct
  14. 24 Feb 2021, Shift 1 · Q49Open the question · Easy · Single correct
  15. 25 Feb 2021, Shift 1 · Q50Lactose Structure and Linkage · Easy · Single correct
  16. 25 Feb 2021, Shift 2 · Q49Maltose Structure and Linkage · Medium · Diagram based · has a figure
  17. 25 Feb 2021, Shift 2 · Q60Open the question · Easy · Numerical value
  18. 26 Feb 2021, Shift 1 · Q49Open the question · Easy · Single correct
  19. 26 Feb 2021, Shift 2 · Q47Seliwanoff's Test · Medium · Single correct
  20. 26 Feb 2021, Shift 2 · Q48Sucrose Structure and Linkage · Easy · Match the list
  21. 22 Jul 2021, Shift 2 · Q50Open the question · Easy · Single correct
  22. 25 Jul 2021, Shift 1 · Q49Open the question · Easy · Single correct
  23. 25 Jul 2021, Shift 2 · Q49Open the question · Easy · Diagram based · has a figure
  24. 16 Mar 2021, Shift 2 · Q50Open the question · Easy · Single correct
  25. 17 Mar 2021, Shift 1 · Q50Open the question · Medium · Diagram based · has a figure
  26. 17 Mar 2021, Shift 2 · Q46Inversion of Cane Sugar · Easy · Single correct
  27. 17 Mar 2021, Shift 2 · Q50Hydrolysis-Based Classification of Carbohydrates · Easy · Single correct
  28. 18 Mar 2021, Shift 1 · Q49Non-Reducing Nature of Sucrose · Easy · Single correct
  29. 18 Mar 2021, Shift 2 · Q50Open the question · Easy · Single correct

JEE Main 202011 questions

  1. 8 Jan 2020, Shift 1 · Q42Reactions Confirming the Carbonyl Group · Medium · Single correct
  2. 8 Jan 2020, Shift 2 · Q39Maltose Structure and Linkage · Easy · Single correct
  3. 9 Jan 2020, Shift 2 · Q41Molisch Test · Medium · Single correct
  4. 2 Sep 2020, Shift 1 · Q45Acetylation of Glucose · Medium · Other
  5. 2 Sep 2020, Shift 2 · Q41Seliwanoff's Test · Easy · Single correct
  6. 3 Sep 2020, Shift 2 · Q50Open the question · Medium · Numerical value
  7. 4 Sep 2020, Shift 1 · Q42Maltose Structure and Linkage · Medium · Single correct
  8. 4 Sep 2020, Shift 2 · Q50Chiral Centers · Easy · Numerical value
  9. 5 Sep 2020, Shift 1 · Q26Open the question · Easy · Single correct
  10. 5 Sep 2020, Shift 1 · Q50Open the question · Medium · Numerical value
  11. 6 Sep 2020, Shift 2 · Q26Lactose Structure and Linkage · Medium · Single correct

JEE Main 20171 question

  1. 2 Apr 2017 (offline) · Q57Reducing vs Non-reducing Sugars · Hard · Single correct · has a figure

Questions from the official JEE Main papers published by NTA. Chapter, topic and idea tags, counts and notes are Lumi’s. Pattern: Asked most years.

More Chemistry, Class 12

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