Structure of DNA & RNA | IISER Exam Biology Preparation | Bioworld with Gauri Mam

Описание: IISER exam biology preparation covering structure of DNA and RNA, DNA double helix, RNA structure biology, DNA RNA differences, nucleic acids structure, molecular genetics, biology for IISER, IAT exam 2026 biology, IISER exam preparation 2026 by Bioworld with Gauri Mam.

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Welcome to Bioworld with Gauri ma'am, your trusted platform for clear explanations and stepwise solved questions in biological sciences.
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IISER Aptitude Test (IAT) including latest MCQs and previous year papers
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👇 Watch the Full Video to Master These Topics:
If you’re preparing for IISER or other biology entrance exams, this lecture builds your molecular biology foundation step-by-step—from nucleic acids to the DNA–RNA relationship.

⏱️ Timestamps - Jump to Your Topic:
00:00:00 - Introduction & Exam Relevance
00:00:34 - Definition of Nucleic Acids
00:00:55 - Two Types: DNA & RNA
00:01:48 - Genetic Material Role
00:02:19 - Key Concept: RNA World Hypothesis
00:03:04 - Cellular Location & Central Dogma
00:04:23 - DNA Double Helix & Antiparallel Strands
00:05:17 - Key Concept: Nitrogenous Bases (Purines vs. Pyrimidines)
00:06:55 - Sugar-Phosphate Backbone
00:07:34 - Key Concept: Base Pairing Rules (A-T, G-C) & H-Bonds
00:10:01 - Structural Difference: Double vs. Single Stranded
00:10:13 - Nucleoside vs. Nucleotide
00:12:38 - Key Concept: 5'→3' Direction of Synthesis
00:13:07 - Summary & Series Preview

📚 Video Summary:
This video starts with the importance of nucleic acids as the base of molecular biology, covering DNA replication, transcription, translation, and mutation. You’ll clearly understand what nucleic acids are, their types (DNA & RNA), and why DNA is the primary genetic material while RNA acts as genetic material in viruses.

Key exam-focused concepts like the RNA World hypothesis, DNA’s double-helical antiparallel structure, nitrogenous bases, base-pairing rules, hydrogen bonding, and the sugar-phosphate backbone are explained in a simple, logical flow.

The lecture also clarifies nucleoside vs nucleotide, 5′ and 3′ ends, and why DNA synthesis always occurs in the 5′→3′ direction—all crucial for competitive exams. The session ends with a crisp recap and a preview of upcoming topics: DNA replication, transcription, and translation.

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