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KEY CONCEPT Transcription converts a gene into a single-stranded RNA molecule.

KEY CONCEPT Transcription converts a gene into a single-stranded RNA molecule. Warm-up. Go to the table with the trait you have answer the following questions On a post-it answer the following questions and post on the nearest parking lot What are traits? How exactly are these traits passed?

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KEY CONCEPT Transcription converts a gene into a single-stranded RNA molecule.

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  1. KEY CONCEPT Transcription converts a gene into a single-stranded RNA molecule.

  2. Warm-up • Go to the table with the trait you have answer the following questions On a post-it answer the following questions and post on the nearest parking lot • What are traits? • How exactly are these traits passed? • How are these characteristics are created?

  3. RNA carries DNA’s instructions. • The central dogma states that information flows in one direction from DNA to RNA to proteins.

  4. replication transcription translation • The central dogma includes three processes. • Replication • Transcription • Translation 2. • RNA is a link between DNA and proteins. 1. 4. 3. 5.

  5. RNA differs from DNA in three major ways. • RNA has a ribose sugar. • RNA has uracil instead of thymine. • RNA is a single-stranded structure.

  6. Transcription makes three types of RNA. • Transcription copies DNA to make a strand of RNA.

  7. transcription complex start site nucleotides • 1. Transcription is catalyzed by RNA polymerase. • RNA polymerase and other proteins form a transcription complex. • The transcription complex recognizes the start of a gene and unwinds a segment of it.

  8. DNA RNA polymerase moves along the DNA 2. RNA polymerase reads one side of the DNA template. • RNA polymerase bonds the complementary nucleotides together. • The DNA helix winds again as the gene is transcribed.

  9. RNA • 3. The RNA strand detaches from the DNA once the gene is transcribed.

  10. Transcription makes three types of RNA. • 1. Messenger RNA (mRNA) carries the message that will be translated to form a protein. • 2. Ribosomal RNA (rRNA) forms part of ribosomes where proteins are made. • 3. Transfer RNA (tRNA) brings amino acids from the cytoplasm to a ribosome.

  11. Check point - Practice • Pass the message (2 – 3 people) • Person #1 – DNA On the whiteboard copy the following DNA strand • AGA GTT CTA ATC CCT • Pass the board to Person #2 – mRNA • Person #2 : Fill in the correct mRNA bases using the base pair rules • Pass the board to Person #3 – tRNA • Person #3: Fill in the correct tRNA bases using the base pair rules • Find the amino acid that goes with the tRNA (use genetic code wheel

  12. You try on your own – who can figure it out first • DNA: • CAG TAT GAA AUG • Discussion Questions • mRNA is synthesized in translation or transcription? • How many codons equal one amino acid? • Where does translation takes place? • Where does transcription takes place?

  13. one gene growing RNA strands DNA The transcription process is similar to replication. • Transcription and replication both involve complex enzymes and complementary base pairing. • The two processes have different end results. • Replication copiesall the DNA;transcription copiesa gene. • Replication makesone copy;transcription canmake many copies.

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