CONTENTS:- 1. Cell Signalling and Gene Transcription. 2. DNA Replication. 3. RNA Extraction. 4. Human Chromosomes. 5. Structural Organization of the Nucleus. 6. Functions of Noncoding DNA. 7. Chemical environment of Cell. 8. Implications of the RNA World. 9. Enzyme Structure. 10. From Organic Molecules to Protocells.