Class 12 Chemistry - TELANGANA
Biomolecules
The chapter 'Biomolecules' in Class 12 Chemistry for Telangana (TSBSE) explores the chemical basis of life, focusing on complex organic molecules that build living systems. You will study carbohydrates, proteins, nucleic acids, vitamins, and lipids. Students will learn the classification, structures, and biological functions of glucose, fructose, amino acids, peptide bonds, DNA, and RNA. This chapter is vital for board exams as it consistently features direct structural, differentiating, and conceptual questions, bridging organic chemistry with biology, and carrying a significant weightage in the final TSBSE examination.
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
Polymers of alpha-amino acids linked together by peptide bonds, existing as zwitterions in solution and exhibiting primary, secondary, tertiary, and quaternary structures.
Nucleic Acids
Biomolecules like DNA and RNA responsible for heredity and protein synthesis, composed of a pentose sugar, nitrogenous base, and phosphate group.
Vitamins
Organic compounds required in small amounts for normal health, growth, and development, categorized into fat-soluble (A, D, E, K) and water-soluble (B-complex, C).
Zwitter Ionic Form
A dipolar ion formed when an amino acid transfers a proton from its carboxyl group to its amino group, giving it both positive and negative charges.
Important Formulas
Board Exam Info
In the Telangana (TSBSE) Class 12 Chemistry board exam, the Biomolecules chapter typically carries around 4 to 6 marks. Expect one short-answer question (2 or 3 marks) and a couple of very short-answer questions (1 mark each). Common question types include defining peptide bonds, differentiating between fibrous and globular proteins, naming deficiency diseases of vitamins, and writing the cyclic structures of glucose or describing the difference 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 (-OH) group at C-1 carbon in their cyclic structures.
Why are vitamins C and B complex stored in our body?
Water-soluble vitamins like B and C cannot be stored in our body and are regularly excreted in urine, so they must be supplied regularly in diet.
What is denaturation of proteins?
The process where native protein loses its secondary and tertiary structures due to physical changes like temperature or chemical changes like pH, leaving the primary structure intact.
Learn Biomolecules with Your AI Tutor
10 different ways to study this chapter. Free for 3 chapters per day.
Lecture
Key Points
Interactive
Quiz
Flashcards