Introduction

Previous Year Papers for JEE Advanced – Chapter-wise, Chemistry STD 12 – Biomolecules is an essential resource for students preparing for JEE Advanced. This chapter focuses on the structure, properties, and reactions of biological molecules including carbohydrates, proteins, amino acids, nucleic acids, and vitamins.

Solving chapter-wise previous year papers helps students strengthen conceptual clarity, improve problem-solving efficiency, and gain confidence in tackling both theoretical and application-based questions in organic and bio-organic chemistry.

Direct Links to Download JEE Advanced - Chapter wise Previous Year Papers Chemistry (PDF)

► Click “Download Here” next to your subject to access the free PDF.

Importance of Chapter-wise Previous Year Papers

Focusing on chapter-wise JEE Advanced papers for “Biomolecules” enables students to:

• Understand the type and difficulty of biomolecule-related questions in JEE Advanced.

• Identify high-frequency topics such as peptide bond formation, monosaccharides, nucleotides, and vitamin reactions.

• Improve accuracy in predicting reaction mechanisms and structure-based questions.

• Build confidence in tackling biomolecule-based questions efficiently.

Chapter-wise practice ensures students master biomolecules before moving to biomolecular pathways and related chemical reactions.

Topics Covered in Biomolecules

This chapter includes several essential topics for JEE Advanced:

Carbohydrates

• Classification: monosaccharides, disaccharides, polysaccharides

• Structure and nomenclature of glucose, fructose, sucrose, lactose, starch, glycogen, and cellulose

• Properties: reducing vs non-reducing sugars, optical activity, mutarotation

• Reactions: oxidation, reduction, glycosidic bond formation, osazone formation

Chapter-wise previous papers often include structure identification, reactions, and stereochemistry questions.

Proteins and Amino Acids

• Classification: essential vs non-essential amino acids

• Structure: primary, secondary, tertiary, quaternary

• Peptide bond formation and hydrolysis

• Reactions of amino acids: Ninhydrin test, reaction with NaOH, bromination, diazotization

• Proteins: structure, denaturation, and functions

JEE Advanced frequently tests peptide bond formation, amino acid reactions, and protein structure identification.

Nucleic Acids

• Structure of DNA and RNA

• Components: nitrogenous bases, pentose sugar, phosphate group

• Watson-Crick model, base pairing rules

• Functions: genetic information storage and transfer

• Reactions: hydrolysis of nucleotides, qualitative tests

Chapter-wise previous papers often ask structure-based questions, base-pairing identification, and reaction mechanisms.

Vitamins and Hormones

• Classification: water-soluble (B-complex, C) and fat-soluble (A, D, E, K) vitamins

• Structures, sources, and functions

• Deficiency diseases

• Hormones: chemical nature and physiological functions

Previous year papers often test recognition of vitamins, chemical structures, and functional significance.

Enzymes

• Biological catalysts and their specificity

• Mechanism of enzyme action

• Factors affecting enzyme activity

• Inhibition: competitive, non-competitive, feedback inhibition

Chapter-wise papers often include numerical or conceptual problems about enzyme kinetics or inhibition mechanisms.

Mechanistic Understanding and Reactions

• Carbohydrate reactions: oxidation, reduction, osazone formation

• Amino acids: bromination, ninhydrin reaction, diazotization

• Peptide bond formation and hydrolysis

• Nucleic acids: hydrolysis, phosphodiester bond cleavage

• Vitamin reactions under acidic/basic conditions

Numerical, reasoning-based, and mechanism questions are common in JEE Advanced.

Comparative Properties

• Reducing vs non-reducing sugars

• Acidic vs basic amino acids

• Structural differences between DNA and RNA

• Water-soluble vs fat-soluble vitamins

• Stability and reactivity trends in biomolecules

Chapter-wise previous papers test conceptual understanding and practical application of these trends.

Numerical and Conceptual Problems

• Predicting products of carbohydrate reactions

• Mechanism-based amino acid reaction questions

• Peptide synthesis and hydrolysis calculations

• Base-pairing and nucleotide identification in nucleic acids

• Vitamin deficiency and functional problem-solving

Practicing chapter-wise previous year papers ensures students develop speed, accuracy, and conceptual understanding of biomolecules.

Diagrams and Flowcharts

• Structure of glucose, fructose, and disaccharides

• Peptide bond formation and protein structure levels

• DNA and RNA structure with base-pairing

• Vitamin classification chart

• Enzyme reaction mechanism diagrams

Visual understanding is often tested in JEE Advanced, making diagram practice crucial for clarity.

Benefits of Solving Chapter-wise Previous Year Papers

Targeted Practice – Focus on one chapter to strengthen weak areas.

Pattern Recognition – Identify frequently asked questions and recurring mechanism types.

Time Management – Practicing under timed conditions improves efficiency.

Confidence Building – Exposure to real exam questions reduces anxiety and strengthens problem-solving skills.

Tips for Practicing Biomolecules

1. Master NCERT Theory – Understand structure, reactions, and properties thoroughly.

2. Focus on Mechanisms – Be confident in peptide bond formation, carbohydrate reactions, and nucleotide chemistry.

3. Solve Chapter-wise Previous Papers – Begin with this chapter before attempting full mock tests.

4. Maintain an Error Notebook – Track mistakes and revise difficult reaction or structure questions repeatedly.

5. Time-bound Practice – Solve mechanism-based problems under timed conditions to improve speed and accuracy.

6. Use Trusted Sources – Platforms like Studentbro.in provide updated chapter-wise previous papers with step-by-step solutions.

How Studentbro.in Helps Students Prepare

Studentbro.in provides a structured approach to chapter-wise JEE Advanced preparation:

• Organized Chapter-wise PDFs – Downloadable previous year papers for focused practice.

• Step-by-Step Solutions – Detailed explanations clarify concepts and improve problem-solving efficiency.

• Flexible Learning – Practice offline or online at your own pace.

• Regular Updates – New JEE Advanced papers are added annually to stay aligned with the latest exam pattern.

Conclusion

Mastering Biomolecules is essential for building a strong foundation in JEE Advanced Chemistry. Chapter-wise previous year papers from Studentbro.in allow students to:

• Strengthen conceptual clarity

• Improve mechanism-based problem-solving skills

• Recognize frequently asked questions on carbohydrates, amino acids, proteins, nucleic acids, and vitamins

• Build confidence for exam day

Consistent chapter-wise practice ensures students are fully prepared to tackle one of India’s toughest engineering exams. Structured preparation combined with mechanistic understanding, property analysis, and problem-solving makes cracking JEE Advanced achievable while reducing exam stress.