Reverse Transcription | Central Dogma Exceptions RNA Virus | NEET Class 12 | Neela Bakore
Neela Bakore Tutorials
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Reverse Transcription | Central Dogma Exceptions RNA Virus | NEET Class 12 | Neela Bakore
118 899 просмотров · 10 л. назад
Neela Bakore Tutorials
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118 899 просмотров · 10 л. назад
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Can genetic information flow backward? Yes — through Reverse Transcription! This video explains the exception to the Central Dogma and its biological importance.
📌 Topics Covered:
• Central Dogma of Molecular Biology (Crick, 1958): DNA→RNA→Protein
• Extended Central Dogma — exceptions:
RNA→DNA (Reverse Transcription)
RNA→RNA (RNA replication in RNA viruses)
DNA→Protein (direct translation — rare)
• Reverse Transcriptase enzyme (Howard Temin, David Baltimore, 1970)
• Retroviruses (e.g. HIV): RNA genome → DNA using reverse transcriptase
• cDNA (complementary DNA) synthesis
• Significance in biotechnology and medicine
• NEET MCQ on central dogma exceptions
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Transcript with Timestamp
0:00 Normal central dogma: DNA → mRNA → protein (Crick)
3:02 If RNA is genetic material: RNA → (reverse transcriptase) → DNA → mRNA → protein
4:15 Reverse transcription = Teminism (named after Temin and Baltimore)
4:42 Examples of RNA genetic material: TMV, HIV (always have reverse transcriptase)
5:22 Retroviruses: RNA genetic material
5:44 Process: virus attaches → injects RNA → reverse transcription → DNA formed → RNA-DNA hybrid
7:48 DNA → mRNA (transcription) → viral proteins (translation)
10:03 Many viruses assembled → host cell ruptures → viruses released
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