Class 12 Chemistry - MP
Biomolecules
The 'Biomolecules' chapter in Class 12 Chemistry explores the chemical basis of life, focusing on complex organic molecules that form living systems. Students study the classification, structure, and functions of carbohydrates, proteins, nucleic acids, vitamins, and lipids. For MPBSE board exams, this is a high-scoring and scoring-intensive chapter, often featuring direct questions on structures, definitions, peptide linkages, glycosidic bonds, and the differences between DNA and RNA. Mastering this chapter ensures easy marks in both objective and short-answer sections.
Start Learning FreeKey Concepts
Carbohydrates
Optically active polyhydroxy aldehydes or ketones, classified as monosaccharides, oligosaccharides, and polysaccharides based on hydrolysis behavior.
Proteins and Amino Acids
Proteins are polymers of alpha-amino acids linked together by peptide bonds, possessing primary, secondary, tertiary, and quaternary structural levels.
Nucleic Acids
Biopolymers like DNA and RNA responsible for the storage and transmission of hereditary information, made of pentose sugar, nitrogenous bases, and phosphate groups.
Vitamins
Organic compounds required in small amounts for normal health and growth, categorized into water-soluble (B, C) and fat-soluble (A, D, E, K) vitamins.
Enzymes
Biocatalysts produced by living cells that speed up biochemical reactions with high specificity and efficiency.
Important Formulas
Board Exam Info
In the Madhya Pradesh (MPBSE) Class 12 Chemistry board exam, Biomolecules typically carries around 4 to 6 marks. Questions frequently include objective type questions (fill in the blanks, match the following), short-answer questions defining peptide linkage, glycosidic linkage, or denaturation of proteins, and structural distinctions between DNA and RNA.
Frequently Asked Questions
What is the difference between alpha-D-glucose and beta-D-glucose?
They are anomers that differ only in the configuration of the hydroxyl group (-OH) at C-1 carbon atom.
What is a peptide bond?
An amide linkage formed between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid with the elimination of a water molecule.
Why are vitamin C and B complex not stored in our body?
Because they are water-soluble and are regularly excreted in urine, hence they must be supplied regularly through diet.
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