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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

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How DNA works?

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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.

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

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mRNA Nucleus Transcription Animal cell DNA template

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

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mRNA Anticodon Amino Acid tRNA tRNA and Anticodon

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Different codon & respective amino acid

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Protein Synthesis Transcription Translation Polypeptide chain Nucleus Cytoplasm

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Method of Translation mRNA

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

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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

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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?

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Assignment Why is protein synthesis important?

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Thanks a lot