Karnataka 2nd PUC Chemistry Chapter 10 Important Questions 2027

Preparing for Karnataka 2nd PUC Chemistry Chapter 10 Important Questions 2027 can become difficult when you need to remember several chemical structures, reactions, classifications and examples. Topics such as carbohydrates, proteins, vitamins and nucleic acids involve different terms and properties. You may understand these concepts while studying but find it difficult to recall the correct details while solving questions.

The Karnataka 2nd PUC Chemistry Chapter 10 Important Questions 2027 focus on important concepts from Biomolecules. You can use them with your textbook and notes to revise key facts and identify topics that need more practice. The chapter material includes multiple-choice questions on carbohydrates, amino acids, proteins, enzymes, vitamins, nucleic acids and hormones.

2nd PUC Chemistry Chapter 10 PDF

The Karnataka 2nd PUC Chemistry Chapter 10 Important Questions can help you keep the questions together for revision. You can use the PDF while studying Biomolecules from your textbook, class notes, and other study material.

The 2nd PUC Chemistry Chapter 10 PDF covers questions on reducing and non-reducing sugars, glucose reactions, protein structures, amino acids, vitamin deficiencies, nucleic acids, and hormones. It also includes questions from previous KCET examinations, as indicated in the material.

Karnataka 2nd PUC Chapter 10 Important Questions

The following questions are taken from the chapter-wise question resource provided for the chapter. 

1. Which of the following is a non-reducing sugar?

(a) Glucose

(b) Fructose

(c) Maltose

(d) Sucrose

2. Glucose on prolonged heating with red P and HI gives:

(a) n-Hexane

(b) Hexanoic acid

(c) Sorbitol

(d) Gluconic acid

3. Glucose reacts with bromine water to form:

(a) Saccharic acid

(b) Gluconic acid

(c) n-Hexane

(d) Glucoxime

4. In sucrose, the glycosidic linkage is formed between:

(a) C1 of -D-glucose and C2 of -D-fructose

(b) C1 of -D-glucose and C4 of -D-glucose

(c) C1 of -D-galactose and C4 of -D-glucose

(d) C1 of -D-glucose and C4 of -D-fructose

5. Maltose is composed of:

(a) Two -D-glucose units

(b) -D-glucose and -D-fructose

(c) -D-galactose and -D-glucose

(d) Two -D-glucose units

6. Based on their behaviour on hydrolysis, carbohydrates are broadly divided into three groups. A carbohydrate that cannot be hydrolysed further into simpler units of polyhydroxy aldehyde or ketone is called:

(a) Oligosaccharide

(b) Disaccharide

(c) Monosaccharide

(d) Polysaccharide

7. An oligosaccharide on hydrolysis yields:

(a) Only two monosaccharide units

(b) Two to ten monosaccharide units

(c) More than ten monosaccharide units

(d) Hundreds of monosaccharide units

8. Which of the following carbohydrates on hydrolysis yields two molecules of glucose only?

(a) Lactose

(b) Maltose

(c) Cellulose

(d) Sucrose

9. Reaction of D-glucose with bromine water yields gluconic acid. This reaction confirms the presence of:

(a) A primary alcoholic group

(b) A carbonyl group (>C=O)

(c) An aldehyde group (-CHO)

(d) Five hydroxyl groups (-OH)

10. Which reagent is used to confirm the presence of a primary alcoholic (-CH2OH) group in D-glucose?

(a) Bromine water

(b) Acetic anhydride

(c) Concentrated HNO3

(d) Hydroxylamine

11. Sucrose is a non-reducing sugar because the glycosidic linkage is formed between:

(a) C1 of -D-glucose and C4 of -D-fructose

(b) C1 of -D-glucose and C2 of -D-fructose

(c) C1 of -D-galactose and C4 of -D-glucose

(d) C1 of -D-glucose and C4 of -D-glucose

12. Hydrolysis of dextrorotatory sucrose yields an equimolar mixture of glucose and fructose which is laevorotatory. This product mixture is termed:

(a) Syrup sugar

(b) Invert sugar

(c) Anomeric mixture

(d) Racemic sugar

13. Amylose, the water-soluble component of starch, consists of:

(a) Unbranched chain of -D-glucose with C1-C4 glycosidic links

(b) Branched chain of -D-glucose with C1-C6 branch links

(c) Straight chain of -D-glucose with C1-C4 links

(d) Branched chain of -D-glucose with C1-C4 links

14. In amylopectin, branching occurs at regular intervals through which glycosidic bond?

(a) C1-C4 glycosidic bond

(b) C1-C6 glycosidic bond

(c) C1-C2 glycosidic bond

(d) C2-C6 glycosidic bond

15. Glycogen, also known as animal starch, structurally resembles:

(a) Amylose with longer unbranched chains

(b) Amylopectin with more highly branched structure

(c) Cellulose with -linkages

(d) Sucrose dimer chains

16. Which of the following is a non-reducing disaccharide?

(a) Maltose

(b) Lactose

(c) Cellobiose

(d) Sucrose

17. Glucose reacts with hydrogen cyanide (HCN) to form a cyanohydrin. This reaction proves the presence of:

(a) Five hydroxyl groups

(b) A carbonyl group

(c) An aldehyde group

(d) A primary alcohol

18. How many chiral carbon atoms are present in the open-chain structure of D-(+)-glucose?

(a) 3

(b) 4

(c) 5

(d) 6

19. How many chiral carbon atoms are present in -D-(+)-glucopyranose cyclic structure?

(a) 3

(b) 4

(c) 5

(d) 6

20. Assertion (A): Glucose does not give Schiff's test despite having an aldehyde group. Reason (R): Glucose exists predominantly in cyclic hemiacetal forms with no free -CHO group.

(a) Both A and R are true, and R is the correct explanation of A

(b) Both A and R are true, but R is NOT the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

How to Use Important Solutions for Karnataka 2nd PUC Biomolecules for Exam Preparation

A good revision plan for Biomolecules should balance concept reading with repeated question practice. 

• Revise carbohydrate classification: Focus on monosaccharides, oligosaccharides and polysaccharides. Understand the differences between reducing and non-reducing sugars, with examples such as glucose, maltose, lactose and sucrose.

• Understand glucose reactions: Revise the reactions of glucose with bromine water, hydroxylamine, hydrogen cyanide, hydroiodic acid and nitric acid. Remember what each reaction indicates about the structure of glucose.

• Study important polysaccharides: Learn the structures and properties of starch, cellulose and glycogen. Pay attention to amylose, amylopectin and their glycosidic linkages.

• Revise amino acids and proteins: Focus on zwitterions, essential and non-essential amino acids, fibrous and globular proteins, and the four levels of protein structure. Also revise protein denaturation and its examples.

• Understand enzymes and vitamins: Learn the role of enzymes as biocatalysts. Revise fat-soluble and water-soluble vitamins, their sources and the deficiency disorders associated with them.

• Focus on nucleic acids: Revise the components of nucleotides, the difference between nucleosides and nucleotides, DNA base pairing and the differences between DNA and RNA.

• Revise hormones: Focus on the functions of insulin, thyroxine, glucocorticoids and sex hormones included in the chapter material.

• Use the Karnataka 2nd PUC Previous Year Question Paper: Practising previous-year questions can help you become familiar with question formats and identify concepts that require more revision.

• Solve Karnataka 2nd PUC Model Papers 2026-27: Include model papers in your revision schedule to practise applying concepts across different question types.

• Understand the Karnataka 2nd PUC Exam Pattern 2027: Review the exam pattern before planning your revision and question practice.

• Practise with the Karnataka 2nd PUC Mid Term Question Paper: Use it as an additional resource to revise concepts and assess your preparation.

Related Resources 

• Karnataka 2nd PUC Physics Important Questions 2026-27

• Karnataka 2nd PUC Maths Important Questions 2026-27

• Karnataka 2nd PUC Syllabus 2026-27

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