Biomolecules

JEE Advanced · Chemistry · 26 past questions

1. Q1 2026 Paper 2

   The correct statement(s) regarding sugars is(are)…

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2. Q2 2025 Paper 1

   The monomer (**X**) involved in the synthesis of Nylon 6,6 gives positive carbylamine test. If 10 moles of…

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3. Q3 2025 Paper 2

   A linear octasaccharide (molar mass = 1024 g mol$^{-1}$) on complete hydrolysis produces three…

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4. Q4 2024 Paper 1

   Aspartame, an artificial sweetener, is a dipeptide aspartyl phenylalanine methyl ester. The structure of… (with a figure)

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5. Q5 2024 Paper 2

   For a double strand DNA, one strand is given below… (with a figure)

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6. Q6 2023 Paper 2

   A disaccharide **X** cannot be oxidised by bromine water. The acid hydrolysis of **X** leads to a… (with a figure)

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7. Q7 2022 Paper 2

   Treatment of D-glucose with aqueous NaOH results in a mixture of monosaccharides, which are (with a figure)

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8. Q8 2021 Paper 1

   The compound(s), which on reaction with $\mathrm{HNO_3}$ will give the product having degree of rotation… (with a figure)

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9. Q9 2019 Paper 1

   Which of the following statement(s) is(are) true?

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10. Q10 2018 Paper 2

    The Fischer presentation of D-glucose is given below.… (with a figure)

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11. Q11 2018 Paper 2

    The desired product X can be prepared by reacting the major product of the reactions in LIST-I with one or… (with a figure)

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12. Q12 2016 Paper 1

    Positive Tollen's test is observed for (with a figure)

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13. Q13 2016 Paper 2

    For 'invert sugar', the correct statement(s) is(are)…

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14. Q14 2015 Paper 1

    The major product of the reaction is (with a figure)

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15. Q15 2014 Paper 1

    The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the… (with a figure)

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16. Q16 2013 Paper 1

    A tetrapeptide has $-COOH$ group on alanine. This produces glycine (Gly), valine (Val), phenyl alanine (Phe)…

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17. Q17 2012 Paper 1

    The substituents $R_1$ and $R_2$ for nine peptides are listed in the table given below. How many of these… (with a figure)

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18. Q18 2012 Paper 1

    When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its… (with a figure)

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19. Q19 2011 Paper 1

    A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine.…

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20. Q20 2011 Paper 2

    The following carbohydrate is (with a figure)

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21. Q21 2010 Paper 1

    The correct statement about the following disaccharide is (with a figure)

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22. Q22 2010 Paper 1

    The total number of basic groups in the following form of lysine is (with a figure)

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23. Q23 2009 Paper 2

    The correct statement(s) about the following sugars X and Y is(are) (with a figure)

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24. Q24 2008 Paper 2

    Cellulose upon acetylation with excess acetic anhydride/H$_2$SO$_4$ (catalytic) gives cellulose triacetate… (with a figure)

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25. Q25 2007 Paper 1

    Match the chemical substances in Column I with type of polymers/type of bonds in Column II. Indicate your…

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26. Q26 2007 Paper 2

    STATEMENT-1: Glucose gives a reddish-brown precipitate with Fehling's solution.…

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