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Biomolecules

20 questions · Chemistry · JEE Advanced
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Biomolecules

20 questions · Chemistry · JEE Advanced

  1. A linear octasaccharide (molar mass =1024 g mol−1) on complete hydrolysis produces three monosaccharides: ribose, 2-deoxyribose and glucose. The amount of 2-deoxyribose formed is 58.26%(w/w)…2025 · Shift 2 · Q16 · Numerical
  2. For a double strand DNA, one strand is given below: The amount of energy required to split the double strand DNA into two single strands is ​ kcal mol−1. [Given: Average energy per H-bond for… Includes diagram2024 · Shift 2 · Q10 · Numerical
  3. A disaccharide X cannot be oxidised by bromine water. The acid hydrolysis of X leads to a laevorotatory solution. The disaccharide X is :2023 · Shift 2 · Q4 · MCQ
  4. Treatment of D-glucose with aqueous NaOH results in a mixture of monosaccharides, which are2022 · Shift 2 · Q18 · MCQ
  5. Given : The compound(s), which on reaction with HNO3​ will give the product having degree of rotation, [α]D = − 52.7 ∘ is (are) Includes diagram2021 · Shift 1 · Q11 · Multiple correct
  6. The structure of a peptide is given below. If the absolute values of the net charge of the peptide at pH=2, pH=6, and pH=11 are ∣Z1​∣,∣Z2​∣, and ∣Z3​∣, respectively,… Includes diagram2020 · Shift 2 · Q5 · Numerical
  7. Which of the following statement(s) is(are) true?2019 · Shift 1 · Q10 · Multiple correct
  8. The Fischer presentation of D-glucose is given below. The correct structure(s) of β-L-glucopyranose is (are) : Includes diagram2018 · Shift 2 · Q2 · Multiple correct
  9. For "invert sugar", the correct statement(s) is(are) (Given : specific rotations of (+)-sucrose, (+)-maltose, L-(−)-glucose and L-(+)-fructose in aqueous solution are +66 ∘, +140 ∘, − 52 ∘ and +92 ∘,…2016 · Shift 2 · Q13 · Multiple correct
  10. The structure of D-(+)-glucose is The structure of L-(−)-glucose is Includes diagram2015 · Shift 1 · Q16 · Multiple correct
  11. The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is Includes diagram2014 · Shift 1 · Q16 · Numerical
  12. The total number of lone-pairs of electrons in melamine is2013 · Shift 1 · Q2 · Numerical
  13. A tetrapeptide has − COOH group on alanine. This produces glycine (Gly), valine (Val), phenyl alanine (Phe) and alanine (Ala), on complete hydrolysis. For this tetrapeptide, the number of possible sequences (primary structures) with − NH2​…2013 · Shift 1 · Q20 · Numerical
  14. The substituents R1 and R2 for nine peptides are listed in the table given below. How many of these peptides are positively charged at pH = 7.0 ? Includes table Includes diagram2012 · Shift 1 · Q19 · Numerical
  15. A decapeptide (mol. wt. 796) on complete hydrolysis gives glycine (mol. wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is…2011 · Shift 1 · Q23 · Numerical
  16. The following carbohydrate is Includes diagram2011 · Shift 2 · Q12 · MCQ
  17. The correct statement about the following disaccharide is : Includes diagram2010 · Shift 1 · Q15 · MCQ
  18. The total number of basic groups in the following form of lysine is Includes diagram2010 · Shift 1 · Q25 · Numerical
  19. The correct statement(s) about the following sugar X and Y is(are) Includes diagram2009 · Shift 2 · Q9 · Multiple correct
  20. Cellulose upon acetylation with excess acetic anhydride/H 2​ SO 4​ (catalytic) gives cellulose triacetate whose structure is :2008 · Shift 2 · Q3 · MCQ