1 / 10

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

KEY CONCEPT Transcription converts a gene into a single-stranded RNA molecule. RNA carries DNA’s instructions. The central dogma states that information flows in one direction from DNA to RNA to proteins. replication. transcription. translation. The central dogma includes three processes.

herman-oneal
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

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

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

  4. 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.

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

  6. transcription complex start site nucleotides • 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.

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

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

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

  10. 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.

More Related