8 4 Transcription KEY CONCEPT Transcription 8 4

8. 4 Transcription KEY CONCEPT Transcription ________________________________________.

8. 4 Transcription RNA ______________________. • The central dogma states that information flows in one direction from DNA to RNA to proteins.

8. 4 Transcription • The central dogma includes three processes. – ________ –________ replication –________ transcription • RNA is a link between DNA and proteins. translation

8. 4 Transcription • RNA differs from DNA in three major ways. – RNA ______________________________. – RNA ________________.

8. 4 Transcription makes three types of RNA. • Transcription ________________.

8. 4 Transcription • Transcription makes three types of RNA. – Messenger RNA (m. RNA) _________________________________. – Ribosomal RNA (r. RNA) forms part of ribosomes where proteins are made. – Transfer RNA (t. RNA) ___________________________________.

8. 4 Transcription • RNA polymerase ________________ – RNA polymerase and other proteins form a transcription complex. – The transcription complex ____________________________. start site transcription complex nucleotides

8. 4 Transcription – Nucleotides pair with one strand of the DNA. – RNA polymerase bonds the nucleotides together. – The DNA helix winds again as the gene is transcribed. DNA RNA polymerase moves along the DNA

8. 4 Transcription – The RNA strand detaches from the DNA once the gene is transcribed. RNA

8. 4 Transcription The transcription process is similar to replication. • Transcription and replication ______________________________. • The two processes have different end results. – Replication ____________; transcription copies one gene growing RNA strands a gene. – Replication ____________; DNA transcription can make many copies.

8. 4 Transcription