Unit - 4

Gram Positives and heterogeneous members: Overall view of– ecological occurrence, morphological diversity, structural, metabolic and genetic diversity, their importance and classification of phyla Firmicutes – Actinobacteria – Bacteroidetes – Spirochetes – Tenericutes (Mollicutes) – Acidobacteria – Planctomycetes – Verrucomicrobia – Chlamydia.

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

1. Introduction to photosynthesis - Lect 1

2. Characteristic and metabolism of autotrophs - Lect 2

3. Understanding about the anoxygenetic photosynthetic bacteria - Lect 3A and Lect 3B

4. Salient points about cyanobacteria - Lect 4

5. For CO2 fixation and mechanism of photosynthesis - click HERE ; The two major steps in photosynthesis are: (i) Photophosphorylation and (ii) C fixation were clearly depicted in this DIAGRAM ; for a clear explanation of the same click HERE

6. Chemolithotrophs Introduction - Lect 5

7. Hydrogen bacteria, nitrifying bacteria, sulfur bacteria and iron bacteria - Lect 6A ; Lect 6B; Lect 6C (click HERE for comparison table about Sulfur bacteria) and Lect 6D

8. Methanogens - Lect 7A and Lect 7B

9. Methylotrophs - Lect 8