Unit - 3 

Steps involved in transcription of prokaryotes, promoters, transcription factors, RNA polymerases I, II and III – ribosomal RNA transcription and processing – genetic code, deciphering the genetic code, characteristics of genetic code, Wobble hypothesis, central dogma of life and reversal of central dogma.

Video lectures (Watch the video files with headphone for audio clarity and note the points in course journal (CJ), and get it signed by the course teacher). To find the key points that should be there in CJ, click HERE 

1. Introduction to transcription process, its steps including initiation - elongation - termination  - Lect 1

• To know about transcription in prokaryotes (in Tamil) click HERE for one more video click HERE 

2. Explanation about the promoters and transcription factors - Lect 2 ; to know how a RNA polymerase binds to a promoter click HERE; click HERE to see how an enhancer works 

• To know about the overall process of transcription and a clear understanding over transcription factors click HERE

3. Explanation about the prokaryotic and eukaryotic RNA polymerases  - Lect 3

4. Explanation of Initiation, Elongation & Termination of transcription in detail - Lect 4

• Check this simple video that shows how the Rho dependent termination during transcription 

• Check this simple video for the Rho independent termination during transcription

5. RNA (ribosomal, tRNA) transcription and processing - Lect 5

6. Introduction to genetic code and deciphering the genetic code - Lect 6

7. Salient features of the genetic code - Lect 7

• For an Introduction and explanation of genetic code, with details of amino acids (in Tamil) click HERE and for salient features of genetic code (in Tamil) click  HERE

8. Overlapping genes and Wobble's hypothesis - Lect 8

• For an explanation (in Tamil) about Wobble hypothesis click HERE

9. Central dogma Vs reverse central dogma of molecular biology - Lect 9 

• For Central Vs Reverse central dogma explanation (in Tamil) click HERE