Biomolecules — Chapter Summary
Maharashtra Board · Class 12 · Chemistry
Summary of Biomolecules for Maharashtra Board Class 12 Chemistry. Part of the Maharashtra Board Class 12 Chemistry syllabus.
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Overview
Biomolecules are the fundamental chemical compounds that form the building blocks of life. This chapter explores three principal biomolecules - carbohydrates, proteins, and nucleic acids - which are essential for the structure and functioning of living organisms. Understanding their chemical structu
Key Concepts
Carbohydrates are polyhydroxy aldehydes or ketones
Carbohydrates are polyhydroxy aldehydes or ketones with general formula Cx(H2O)y. They are classified as: (1) Monosaccharides - simplest units like gl
Glucose (C6H12O6) exists in open chain
Glucose (C6H12O6) exists in open chain (aldohexose) and cyclic forms (α and β anomers of glucopyranose). Key reactions: (1) With NH2OH → oxime, (2) Wi
Formed by condensation of two monosaccharides
Formed by condensation of two monosaccharides with elimination of H2O. Types: (1) Sucrose: α-glucose + β-fructose (α-1,2 linkage), non-reducing, (2) M
α
α-amino acids have general structure NH2-CHR-COOH with L-configuration. 20 natural amino acids classified as neutral, acidic, or basic. Exist as zwitt
Four levels
Four levels: (1) Primary - amino acid sequence, (2) Secondary - α-helix and β-pleated sheet through H-bonding, (3) Tertiary - 3D folding through vario
Learning Objectives
- Understand the classification and structure of carbohydrates including monosaccharides, disaccharides, and polysaccharides
- Learn the chemical properties and reactions of glucose and other important sugars
- Comprehend the structure and types of amino acids and their role in protein formation
- Analyze the four levels of protein structure and understand enzyme catalysis
- Study the structure and function of nucleic acids (DNA and RNA) and their components
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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