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Friday, 9 October

JEE Main Chemistry · Class 12

Biomolecules: JEE Main previous year questions

Biomolecules had 50 questions in the 42 JEE Main shifts Lumi analysed, about 1.0 a shift, asked in 42 of 42 shifts. It ranks 11 of 30 Chemistry chapters by questions; 8% of its questions were hard.

Questions
50
in 42 of 42 shifts
A shift, on average
1.0
of 25 Chemistry questions
Since 2024
+0.3
0.9 a shift in 2017–23, 1.2 in 2024–26
Numerical answer
5
10% of its questions

Year by year

How often it came

Questions in the analysed shifts of each year. Years differ in how many shifts Lumi analysed, so read the bars with the shift count.

Questions each year
07141’174’204’214’225’238’2411’2513’26

2017: 1 shifts · 2020: 4 shifts · 2021: 4 shifts · 2022: 4 shifts · 2023: 4 shifts · 2024: 8 shifts · 2025: 8 shifts · 2026: 9 shifts

Difficulty by year
  • 20171
  • 20204
  • 20214
  • 20224
  • 20235
  • 20248
  • 202511
  • 202613
  • Easy
  • Medium
  • Hard

Inside the chapter

Topics and the ideas that repeat

1 topics and 15 distinct ideas; 4 ideas were asked more than once. Most questions are single correct and recall.

Topics, by questions

30 questions had no close topic in our taxonomy and are counted for the chapter only.

Ideas asked most
4 repeat

Study it on Lumi

Biomolecules: the interactive lesson

Every question

All 50 Biomolecules questions

Newest first. Each opens with its options and the official answer.

2026 13 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

2025 11 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

2024 8 questions

  1. 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
  2. 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
  3. 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
  4. 9 Apr 2024, Shift 2 · Q80The incorrect statement about Glucose is :EasySingle correct
  5. 29 Jan 2024, Shift 1 · Q78Type of amino acids obtained by hydrolysis of proteins is :EasySingle correct
  6. 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
  7. 31 Jan 2024, Shift 1 · Q79Match List I with List II LIST I A. Glucose/NaHCO3\mathrm{NaHCO_3}/Δ\Delta B. Glucose/HNO3\mathrm{HNO_3} C. Glucose/HI/Δ\Delta D.…MediumMatch the list
  8. 31 Jan 2024, Shift 2 · Q89From the vitamins A, B1\mathrm{B_1}, B6\mathrm{B_6}, B12\mathrm{B_{12}}, C, D, E and K, the number of vitamins that can be stored in our…MediumNumerical value

2023 5 questions

  1. 6 Apr 2023, Shift 1 · Q63Match List I with List II LIST I - Enzymatic reaction | LIST II - Enzyme A. Sucrose →\rightarrow Glucose and Fructose | I. Zymase B.…EasyMatch the list
  2. 6 Apr 2023, Shift 1 · Q80Match List I with List II LIST I (Vitamin) | LIST II (Deficiency disease) A. Vitamin A | I. Beri-Beri B. Thiamine | II. Cheilosis C.…EasyMatch the list
  3. 8 Apr 2023, Shift 2 · Q78Match List I with List II LIST I (Natural amino acid): A. Glutamic acid; B. Glutamine; C. Tyrosine; D. Tryptophan LIST II (One letter…EasyMatch the list
  4. 11 Apr 2023, Shift 1 · Q79L-isomer of tetrose X (C4H8O4\mathrm{C_4H_8O_4}) gives positive Schiff's test and has two chiral carbons. On acetylation, 'X' yields…HardDiagram basedHas a figure
  5. 13 Apr 2023, Shift 2 · Q79The naturally occurring amino acid that contains only one basic functional group in its chemical structure isMediumSingle correct

2022 4 questions

  1. 25 Jul 2022, Shift 1 · Q78During the denaturation of proteins, which of these structures will remain intact ?EasySingle correct
  2. 28 Jul 2022, Shift 1 · Q78For the below given cyclic hemiacetal (X), the correct pyranose structure is :HardDiagram basedHas a figure
  3. 24 Jun 2022, Shift 1 · Q78A polysaccharide 'X' on boiling with dil H2SO4\mathrm{H_2SO_4} at 393 K under 2-3 atm pressure yields 'Y'. 'Y' on treatment with bromine…EasySingle correct
  4. 29 Jun 2022, Shift 1 · Q78Sugar moiety in DNA and RNA molecules respectively areEasySingle correct

2021 4 questions

  1. 3 Aug 2021, Shift 2 · Q50Which one of the following represents the correct structure of a dinucleotide?MediumDiagram basedHas a figure
  2. 25 Jul 2021, Shift 1 · Q49The water soluble protein is :EasySingle correct
  3. 16 Mar 2021, Shift 2 · Q50The secondary structure of protein is stabilised by :EasySingle correct
  4. 18 Mar 2021, Shift 1 · Q49A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is :EasySingle correct

2020 4 questions

  1. 8 Jan 2020, Shift 1 · Q42Which of the following statement is not true for glucose ?MediumSingle correct
  2. 9 Jan 2020, Shift 2 · Q41A, B and C are three biomolecules. The results of the tests performed on them are given below : | | Molisch's Test | Barfoed Test | Biuret…MediumSingle correct
  3. 2 Sep 2020, Shift 1 · Q45Consider the following reactions : (i) Glucose + ROH →dry HCl\xrightarrow{\text{dry HCl}} Acetal…MediumOther
  4. 6 Sep 2020, Shift 2 · Q26Which one of the following statements is not true ?MediumSingle correct

2017 1 questions

  1. 2 Apr 2017 (offline) · Q57Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution ?HardSingle correctHas a figure

Pattern: Asked most years.