Unit - 4 

Mitochondria – organization of respiratory chain, chloroplasts – photophosphorylation, nucleus, nucleolus, nuclear membrane and organization of chromosomes, cell cycle and its check points, cell division (mitosis and meiosis).

Video Lectures (Watch the video files with headphone for audio clarity and note the points in course journal (CJ), submit the same to course teacher & get signed) (to know what is CJ click HERE). To find the key points that should be there in CJ, click HERE

1. Mitochondria explanation - Lect 1A  ; Mitochondria function -  Lect 1B

• Mitochondria explained in Tamil click HERE

• For ATP synthesis in Mitochondria explained in Tamil click HERE

2. Electron transport chain (ETC) explanation - Lect-2

• Click HERE for a video (starts in 3.55 min) explaining the concept of ETC (as oxidative phosphorylation) (starts in 3.55 min)

• ETC explained in Tamil click HERE

3. Chloroplast explanation - Lect 3

• Click HERE for a video explaining about Photosynthesis - Light reaction comprises of ETC (with photophosphorylation) and Calvin cycle 

4. Nucleus, Nuclear membrane & Nucleolus - Lect 4A  ;  Chromatin - Lect 4B

• To listen for an explanation about Nucleus, Nucleolus and Nuclear membrane in Tamil click HERE 

5. Chromosomes organization explanation - Lect 5

• To listen for an explanation about chromosome in Tamil click HERE 

6. For cell cycle and check points click HERE

• For explanation of cell cycle (in Tamil) click the lecture series - Lect - I, Lect-II, Lect-III