DNA Structure Explained | Nucleotides, Purines, Pyrimidines & Types of DNA

This lecture provides a comprehensive overview of DNA (Deoxyribonucleic Acid), the fundamental molecule of life responsible for genetic information, inheritance, and control of cellular functions. The session explains DNA as a self-replicating linear polymer of nucleotides and highlights its role in coding for structural and functional proteins.

Key biochemical terms such as nucleotide, nucleoside, purines, and pyrimidines are clearly defined. The lecture also discusses the basic structure of nucleotides, including nitrogenous bases, pentose sugar, and phosphate groups, helping students understand how DNA is constructed at the molecular level.

In addition, different structural forms of DNA (A-DNA, B-DNA, and Z-DNA) are introduced, with emphasis on their distinguishing features and biological relevance.

📌 Topics Covered:

Definition and biological importance of DNA

DNA as the carrier of genetic information

Nucleotide and nucleoside structure

Purines and pyrimidines

Linear polymer structure of DNA

Types of DNA: A-DNA, B-DNA, and Z-DNA

This lecture is especially useful for biochemistry, molecular biology, medical, and medical laboratory sciences students.

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