Read and download the CBSE Class 12 Chemistry Biomolecules Questions for the 2025-26 academic session. We have provided comprehensive Class 12 Chemistry school assignments that have important solved questions and answers for Unit 10 Biomolecules. These resources have been carefuly prepared by expert teachers as per the latest NCERT, CBSE, and KVS syllabus guidelines.
Solved Assignment for Class 12 Chemistry Unit 10 Biomolecules
Practicing these Class 12 Chemistry problems daily is must to improve your conceptual understanding and score better marks in school examinations. These printable assignments are a perfect assessment tool for Unit 10 Biomolecules, covering both basic and advanced level questions to help you get more marks in exams.
Unit 10 Biomolecules Class 12 Solved Questions and Answers
POINTSO REMEMBER
1. Carbohydrates are optically active polyhydroxy aldehydes or ketones or molecules which provide such units on hydrolysis.
2. Corbohydrates are classified into three groups (i) monosaccharides,
(ii) oligosaccharides and (iii) polysaccharides.
3. Glucose, the most important source of energy for mammals, is obtained by the digestion of starch.
4. Monosaccharides are held together by glycosidic linkages to form disaccharides or polysaccharides.
5. Proteins are the polymers of about twenty different amino acids which are linked by peptide bonds. Ten amino acids are called essential amino acids because they can not be synthesised in our body, hence must be provided through diet.
6. Proteins perform various structural and dynamic functions in the organisms. Proteins which contain only amino acids, are called simple proteins.
7. The secondary or tertiary structure of proteins get disturbed on change of pH or temperature and they are not able to perform their functions. This is called denaturation of proteins.
8. Enzymes are biocatalysts which speed up the reactions in biosystems. They are very specific and selective and efficient in their actions and chemically all enzymes are proteins.
9. Vitamins are necessory food factors required in the diet. They are classified as fat soluble (A, D, E and K) and water soluble (B group and C).
10. Nucleic acid are responsible for the transfer of characters from parents to offsprings.
11. There are two types of nucleic acids DNA and RNA. DNA contains a five carbon sugar molecule called 2-deoxyribose and RNA contains ribose.
12. Both DNA and RNA contain adenine, guanine and cytosine. The fourth base is thymine in DNA and uracil in RNA. The structure of DNA is double
13. Name the enzyme which catalyses the hydrolysis of maltose into glucose.
14. Give reason : Amylase present in the saliva becomes inactive in the stomach.
[Hint : HCl present in stomach decreases the pH]
15. How would you explain the amphoteric behavior of amino acids.
[Hint : Amino acids are amphoteric due to the presence of both acidic and basic functional groups.]
16. Which forces are responsible for the stability of α – helical structure of proteins.
17. How are polypeptides different from proteins.
18. Which nucleic acid is responsible for carrying out protein synthesis in the cell.
19. The two strands in DNA are not identical but complementary. Explain.
[Hint : H-bonding is present between specific pairs of bases present in stands.]
20. When RNA is hydrolysed, there is no relationship among the quantities of different bases obtained. What does this fact suggest about the structure of RNA.
[Hint : RNA is single stranded].
21. What type of linkage holds together the monomers of DNA and RNA.
[Hint :Phosphodiester linkage]
22. Mention the number of hydrogen bonds between adenine and thymine.
23. A child diagnosed with bone deformities, is likely to have the deficiency of which vitamin?
24. What is meant by the term DNA fingerprinting?
25. List two important functions of proteins in human body.
26. Name the vitamin responsible for coagulation of blood.
27. Except vitamin B12, all other vitamins of group B, should be supplied regularly in diet. Why?
28. How is glucose prepared commercially?
29. What is the structural difference between glucose and fructose?
30. What is the difference between an oligosaccharide and a polysaccharide.
31. Give the Haworth projection of D-glucopyranose.
SA (I) TYPE QUESTIONS (2 - MARK QUESTIONS)
1. What are anomers. Give the structures of two anomers of glucose.
2. Write the hydrolysed products of
(i) maltose (ii) cellulose.
3. Name the two components of starch? Which one is water soluble?
4. (i) Acetylation of glucose with acetic anhydride gives glucose pentaacetate. Write the structure of the pentaacetate.
(ii) Explain why glucose pentaacetate does not react with hydroxylamine?
[Hint : The molecule of glucose pentaacetate has a cyclic structure in which –CHO is involved in ring formation with OH group at C–5]
5. What are vitamins? How are they classified?
6. (i) Why is sucrose called a reducing sugar?
(ii) Give the type of glycosidic linkage present in sucrose.
7. Classify the following as monosaccharides or oligosaccharides.
(i) Ribose (ii) Maltose
(iii) Galactose (iv) Lactose
8. Write the products of oxidation of glucose with
(a) Bromine water (b) Nitric acid
9. State two main differences between globular and fibrous proteins.
10. Classify the following α-amino acids as neutral, acidic or basic.
(i) HOOC – CH2 – CH (NH2) COOH
(ii) C6H5 – CH2 – CH(NH2) COOH
(iii) H2N – (CH2)4 – CH(NH2) – COOH
(iv) HN = C – (CH2)3 – CH(NH2)COOH
11. You have two amino acids, i,e. glycine and alanine. What are the structures of two possible dipeptides that they can form?
12. What are essential and non essential amino acids? Give one example of each type.
13. Name four type of intermolecular forces which stabilize 2° and 3° structure of proteins.
[Hint : Hydrogen bonds, disulphide linkages, vander Waals and electrostatic forces of attraction.]
14. Classify the following as globular or fibrous proteins.
(i) Keratin (ii) Myosin
(iii) Insulin (iv) Haemoglobin.
15. What do you understand by
(a) denaturation of protein (b) specificity of an enzyme.
16. On electrolysis in acidic solution amino acids migrate towards cathode while in alkaline solution they migrate towards anode.
[Hint : In acidic solution, COO– group of zwitter ion formed from α-amino acid is protonated and NH3 + groups is left unchanged while in basic solution deprotonation converts NH3 + to NH2 and COO– is left unchanged.]
17. (i) Name the disease caused by deficiency of vitamin D.
(ii) Why cannot vitamin C be stored in our body?
18. Define the terms hypervitaminosis and avitaminosis.
[Hint : Excess intake of vitamin A and D causes hypervitaminosis while multiple deficiencies caused by lack of more than one vitamins are called avitaminosis]
19. Explain what is meant by :
(i) a peptide linkage (ii) a glycosidic linkage?
[Hint : (i) Peptide linkage refers to the –CONH– linkage formed by reaction between –COOH group of one amino acid with –NH2 group of the other amino acid.
(ii) Glycosidic linkage refers to –C–O–C– linkage between two sugars formed by loss of H2O.]
20. Give the sources of vitamin A and E and name the deficiency diseases resulting from lack of vitamin A and E in the diet.
21. What are the main functions of DNA and RNA in human body.
SA(II) TYPE QUESTIONS (3 - MARK QUESTIONS)
1. How are carbohydrate classified?
2. (i) Name four bases present in DNA.
(ii) Which of them is not present in RNA.
(iii) Give the structure of a nucleotide of DNA.
3. Differentiate between the following :
(i) secondary and tertiary structure of protein.
(ii) α-Helix and β-pleated sheet structure of protein.
(iii) fibrous and globular proteins.
| CBSE Class 12 Chemistry Solutions Assignment Set A |
| CBSE Class 12 Chemistry Solutions Assignment Set B |
| CBSE Class 12 Chemistry Solutions Questions |
| CBSE Class 12 Chemistry Halo Alkanes and Halo arenes Assignment |
| CBSE Class 12 Chemistry Halo Alkanes and Halo arenes Questions |
| CBSE Class 12 Chemistry Alcohols Phenols and Ethers Assignment |
| CBSE Class 12 Chemistry Alcohols Phenols and Ethers Questions |
| CBSE Class 12 Chemistry Aldehydes Ketons Carboxylic Acids Questions |
| CBSE Class 12 Chemistry Biomolecules Assignment |
| CBSE Class 12 Chemistry Biomolecules Notes and Questions |
| CBSE Class 12 Chemistry Biomolecules Questions |
Important Practice Resources for Class 12 Chemistry
CBSE Class 12 Chemistry Unit 10 Biomolecules Assignment
Access the latest Unit 10 Biomolecules assignments designed as per the current CBSE syllabus for Class 12. We have included all question types, including MCQs, short answer questions, and long-form problems relating to Unit 10 Biomolecules. You can easily download these assignments in PDF format for free. Our expert teachers have carefully looked at previous year exam patterns and have made sure that these questions help you prepare properly for your upcoming school tests.
Benefits of solving Assignments for Unit 10 Biomolecules
Practicing these Class 12 Chemistry assignments has many advantages for you:
- Better Exam Scores: Regular practice will help you to understand Unit 10 Biomolecules properly and you will be able to answer exam questions correctly.
- Latest Exam Pattern: All questions are aligned as per the latest CBSE sample papers and marking schemes.
- Huge Variety of Questions: These Unit 10 Biomolecules sets include Case Studies, objective questions, and various descriptive problems with answers.
- Time Management: Solving these Unit 10 Biomolecules test papers daily will improve your speed and accuracy.
How to solve Chemistry Unit 10 Biomolecules Assignments effectively?
- Read the Chapter First: Start with the NCERT book for Class 12 Chemistry before attempting the assignment.
- Self-Assessment: Try solving the Unit 10 Biomolecules questions by yourself and then check the solutions provided by us.
- Use Supporting Material: Refer to our Revision Notes and Class 12 worksheets if you get stuck on any topic.
- Track Mistakes: Maintain a notebook for tricky concepts and revise them using our online MCQ tests.
Best Practices for Class 12 Chemistry Preparation
For the best results, solve one assignment for Unit 10 Biomolecules on daily basis. Using a timer while practicing will further improve your problem-solving skills and prepare you for the actual CBSE exam.
You can download free PDF assignments for Class 12 Chemistry Chapter Unit 10 Biomolecules from StudiesToday.com. These practice sheets have been updated for the 2025-26 session covering all concepts from latest NCERT textbook.
Yes, our teachers have given solutions for all questions in the Class 12 Chemistry Chapter Unit 10 Biomolecules assignments. This will help you to understand step-by-step methodology to get full marks in school tests and exams.
Yes. These assignments are designed as per the latest CBSE syllabus for 2026. We have included huge variety of question formats such as MCQs, Case-study based questions and important diagram-based problems found in Chapter Unit 10 Biomolecules.
Practicing topicw wise assignments will help Class 12 students understand every sub-topic of Chapter Unit 10 Biomolecules. Daily practice will improve speed, accuracy and answering competency-based questions.
Yes, all printable assignments for Class 12 Chemistry Chapter Unit 10 Biomolecules are available for free download in mobile-friendly PDF format.