Transcription and translation

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10 Terms

1
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transcription

DNA—>mRNA

2
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translation

mRNA—>protein

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gene expression

producing product based on DNA sequence

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what are the 3 steps of transcription?

  • initiation

  • elongation

  • termination

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what happens during initiation?

  • RNA polymerase binds to region of DNA called the promoter

  • DNA strands unwind at that spot and synthesis begins

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what happens during elongation?

  • RNA polymerase reads template strand from 3’—>5’

  • RNA is synthesized from 5’—>3’

  • polymerase zips DNA back up as it goes

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what happens during termination?

  • RNA polymerase keeps synthesizing until termination signal is reached in DNA

  • new RNA molecule is released

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how does RNA polymerase differ from DNA polymerase?

  • doesn’t require primer

  • does not proof read

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where does RNA go for translation?

to the ribosome

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what happens during translation?

mRNA encodes specific proteins