BIOLOGY OCR A2 F215 MODULE 1 - CELLULAR CONTROL

Oh my days. too many questions.

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1. The genetic code is a degenerate code, this means that:

  • Two triplets code for each amino acid.
  • Various triplets code for one amino acid.
  • One triplet codes for 3 amino acids.
  • Various amino acids code for one triplet.
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2. The first stage of protein synthesis is called:

  • Transition
  • Translocation
  • Transcription
  • Translation

3. The first process of said stage is:

  • The DNA unwinds and unzips.
  • mRNA is produced, which is complementary to the coding strand.
  • mRNA passes out of the nucleus and heads towards a ribosome.
  • Two ATP molecules release their energy to aid the process.
  • Free floating nucleotides bond to the exposed base pairs.

4. Stage 2:

  • The DNA unwinds and unzips.
  • Free floating nucleotides bond to the exposed base pairs.
  • Two ATP molecules release their energy to aid the process.
  • mRNA passes out of the nucleus and heads towards a ribosome.
  • mRNA is produced, which is complementary to the coding strand.

5. Stage 3:

  • The DNA unwinds and unzips.
  • mRNA passes out of the nucleus and heads towards a ribosome.
  • mRNA is produced, which is complementary to the coding strand.
  • Two ATP molecules release their energy to aid the process.
  • Free floating nucleotides bond to the exposed base pairs.
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Alice Kilner

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some of your answers are wrong 

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