2. WELCOME Biology 1 st Paper Class XI, Chapter II Nucleic Acid Duration of class 45.00 M. Dr. J A M Azizul Haque Lecturer in Biology (Botany) Saturia Syed Kalu Shah College Saturia, Manikganj. azizulhe@gmail.com Web: www.azizulhaque.webs.com Mob: 01715 322 380

4. How DNA works?

5. Learning outcome a) Can speak the definition of ‘transformation’ and ‘translation’. At the end of this class students --- b) Can describe codon and anticodon. c) Can explain protein synthesis from ribosome provided information from mRNA by DNA.

6. Ribosome 40 S 60 S 80 S Ribosome Ribosome in the cell RIBOSOME

7. mRNA Nucleus Transcription Animal cell DNA template

8. A A A A UU T T G G G G G C C C C C Triplet and Codon

9. mRNA Anticodon Amino Acid tRNA tRNA and Anticodon

10. Different codon & respective amino acid

11. Protein Synthesis Transcription Translation Polypeptide chain Nucleus Cytoplasm

12. Method of Translation mRNA

13. Video http://ictinedubd.ning.com/video/protein- synthesis (Need internet connection)

14. Group Work Time: 10.00 minutes Write codon and anticodon sequence of mRNA and tRNA respectively by using DNA template above. A T A G C C A T T G A C C T T A G C

15. Evaluation b) What is the difference between codon and anticodon? c) Explain the assembly of proteins by ribosomes? a) Where does protein synthesis take place?

16. Assignment Why is protein synthesis important?

17. Thanks a lot