Tiêu đề Biomolecules- 02.pdf ✅

1 JEE Advanced 2024 Biomolecules 1. Match the column: (A) Sucrose (i) -D glucose C1–C4 glycosidic linkage (B) Lactose (ii) -D glucose, -D fructose C1–C2 glycosidic linkage (C) Cellulose (iii) -D glucose, -D galactose C1–C4 glycosidic linkage Paragraph For Question No. 02 to 04 C H O H HO H H OH H OH OH CH2OH ̄CN / HCN A + B H / H O + 2 Red P/ HI/heat Red P HNO3 HI/ HI/ (i) LAH (ii) H2O D + D' J E F G K 2. What is / are incorrect statement about E. (A) It can evolve CO2 on reaction with NaHCO3. (B) It can give fruity smell on reaction with ethanol in presence of acidic medium (C) It reacts with SOCl2 to give a product which can be converted to a compound by H2/Pd- BaSO4, which can reduce Tollen's reagent (D) It can be reduced by Zn/Hg/HCl. 3. What is relation between G and K. (A) Chain isomer (B) Positional isomer (C) Homologue (D) None of these 4. What is correct statement about J. (A) It is optically inactive (B) It reacts with NaHCO3 (excess) to evolve 1 mole of CO2 (C) Number of stereoisomers possible by structure of J are 16 (D) Number of functional group (different type) present in J are 2. 5. How many products are produced respectively when optically pure glucose and fructose are reduced one by one by NaBH4. (A) 1 & 1 (B) 2 & 2 (C) 1 & 2 (D) 2 & 1 6. PhNHNH2 (Excess) ⎯⎯⎯⎯→ ? Total how many type of osazones are obtained in this reaction sequence. (A) 1 (B) 2 (C) 3 (D) 4 7. 2 2 2 HOOC CH NH C CH — NH C CH NH || | || | O CH Ph O Me − − − − − − − − What will be the correct representation of the above tripeptide. (A) Gly-Phe-Ala (B) Ala-Gly-Phe (C) Gly-Ala-Phe (D) Ala-Phe-Gly DPP-02
2 8. CH OH 2 HO HO H H O H H H OH OH C – ⎯⎯⎯⎯→ CN /HCN H /H O2 + ⎯⎯⎯⎯→ ⎯⎯⎯⎯→ RedP/HI Final product is: (A) (B) COOH (C) COOH (D) CHO 9. HO H H OH H OH C=O CH OH 2 CH OH 2 2 (i)CN/HCN (ii)H /H O ⎯⎯⎯⎯⎯→ + ⎯⎯⎯⎯→ RedP/HI Final major product is: (A) (B) COOH (C) CH OH2 (D) CH=O 10. H OH OH HO H H CHO CH2OH H OH (D-Glucose) Br2 A H2O LiAlH4 B HNO3 C LiAlH4 D Select correct options for given sequence: (A) Both A and C gives effervesence of CO2 with NaHCO3 (B) B on reaction with Red P + HI gives n-hexane (C) C on reaction with Red P + HI gives n-hexanoic acid (D) B and D are identical compounds. 11. Which of the following can reduce Tollen’s reagent. (A) H HO H H OH H OH OH CHO CH 2OH (B) OH (C) C H3C OCH3 H3C (D) OH O | || H2C —C−CH3
3 12. Glycine has the structural formula NH2 –CH2 –COOH. Glycine has two dissociation constant for which Ka is 1.6 × 10–10 and Kb is 2.5 × 10–12. Calculate the isoelectric point of glycine. [Given: log 1.6 = 0.2041, log 2.5 = 0.3979] [Hint: If your answer is 5.12 then fill 0512. If your answer is 8.02 then fill 0802] 13. How many peptides are negatively charge at pH = 7? NH2 – CH2 – COOH, Me CH NH2 | COOH − − , 2 3 C NH2 COOH (CH ) | COOH − − − , 2 2 2 2 NH | NH CH CH CH | COOH − − − , HO | CH CH CH CH COOH | NH 2 2 2 2 − − − − , HOOC CH CH COOH | NH 2 2 − − − , NH CH CH CH COOH | CONH 2 2 2 2 − − − − 14. The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is-
4 Answer Key 1. A -(ii), B -(iii), (C) -(i) 2. ( D ) 3. (C) 4. ( D ) 5. ( C ) 6. ( A ) 7. ( D ) 8. ( B ) 9. ( B ) 10. (A, B, D ) 11. (A, B, D ) 12. (0609 ) 13. ( 2 ) 14. ( 1 )