Biomolecules — Class 12 Chemistry (Samacheer Kalvi)
TN State Board (Samacheer Kalvi) Class 12 Chemistry, Chapter 14. Carbohydrates, proteins, lipids, nucleic acids and vitamins.
1. About this chapter
This chapter covers Biomolecules as part of the Class 12 Samacheer Kalvi Chemistry curriculum. It deals with carbohydrates, proteins, lipids, nucleic acids and vitamins and builds conceptual understanding essential for the TN HSC Public Exam.
By the end of this chapter, students will be able to:
- Describe the structure of glucose, amino acids and DNA
- Explain the role of enzymes and vitamins
2. Key concepts
- Concept 1: Describe the structure of glucose, amino acids and DNA.
- Concept 2: Explain the role of enzymes and vitamins.
3. Important terms and formulas
| Term / Formula | Description |
|---|---|
| Describe the structure of… | Describe the structure of glucose, amino acids and DNA |
| Explain the role of… | Explain the role of enzymes and vitamins |
4. Worked examples
Example 1. Applying a key concept from this chapter.
Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.
Example 2. A typical exam-style question on biomolecules.
Solution: Break the problem into steps, use the appropriate formula and verify the answer.
5. Common mistakes
- Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
- Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.
6. Practice (exam-style)
- Define the main term or principle covered in Chapter 14.
- Give two real-life examples related to biomolecules.
- Solve a short numerical or descriptive question from this chapter.
- State one important formula and explain each symbol.
7. Answer key (hints)
- Refer to section 2 (Key concepts) above for the definition.
- Examples should be drawn from daily experience and local context.
- Apply the formula from section 3, show all steps clearly.
- Formula with units — refer to the textbook glossary for symbol meanings.
8. Quick revision
- Class 12 Chemistry — Chapter 14: Biomolecules.
- Core idea: Carbohydrates, proteins, lipids, nucleic acids and vitamins.
- Key outcomes: Describe the structure of glucose, amino acids and DNA; Explain the role of enzymes and vitamins.
- Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.
