Biomolecules

Explore the contents of biomolecules, including carbohydrate classification and monosaccharides, amino acids and proteins, nucleic acids DNA and RNA, and vitamins.

Explore how carbohydrates are classified into monosaccharides, oligosaccharides, and polysaccharides; learn about reducing and non-reducing sugars and hydrolysis-based definitions in biomolecules.

Explore monosaccharides from triose to heptose, classify as aldose or ketose, and define D/L and alpha/beta configurations, optical isomers, and natural examples glucose and galactose among 16 isomers.

Explore epimers, sugars that differ only at a single carbon, and how carbon-1 chirality yields alpha and beta glucose in cyclic forms with Haworth projections.

Mutarotation describes the spontaneous interconversion between alpha and beta forms of glucose in aqueous solution, reaching an equilibrium with a characteristic change in specific rotation.

Biomolecules explains disaccharides formed by condensing monosaccharides via a glycosidic bond, including sucrose, maltose, and lactose, and their hydrolysis into glucose, fructose, and galactose with inversion sugar.

Explore polysaccharides, including starch, cellulose, and glycogen, as natural condensation polymers of glucose linked by glycosylated linkages; compare their structures and hydrolysis.

Amino acids act as the building blocks of proteins, detailing alpha amino acids, peptide linkages, essential vs nonessential types, and hydrolysis and synthesis methods.

Explore the physical properties of amino acids, including crystallinity and water solubility, high-temperature decomposition around 200°C, zwitterions, isoelectric point, and pH-driven migration in electric fields.

Analyze the chemical properties of amino acids by examining reactions of the carboxyl group, the amino group, and their combination, including acetylation, nitrous acid reactions, and dehydration to cyclic compounds.

Condense amino acids via peptide linkages to form dipeptides and polypeptides, yielding proteins with primary to quaternary structures. Secondary structures like alpha helices and beta sheets stabilized by hydrogen bonds.

Classify proteins by composition, hydrolysis products, and molecular structure, distinguishing simple and conjugated proteins as fibrous or globular, with examples like keratin, enzymes, antibodies, and hormones.

Explore uses of proteins in nutrition—from meat, eggs, fish, and dairy to casein in artificial lentil and gelatin in desserts—and their roles as enzymes, hormones, and hemoglobin.

Nucleic acids are essential polymers built from nucleotides with a sugar–phosphate backbone and nitrogenous bases; DNA and RNA differ in sugar, bases, and structure, with DNA encoding hereditary traits.

Explore the chemical structure of DNA, including its primary and secondary structures, the phosphate–sugar backbone, nitrogenous bases, and the DNA double helix, plus replication, transcription, and translation.

Examine how vitamins, not synthesized by the body and must be obtained from diet, include B vitamins, C, D, E, K, with essential roles in metabolism.