Is this right? Anticodons?

last updated by

Darby 15 years, 5 months ago

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- April 14, 2009 at 11:03 pm #11219
  bearcub
  Participant
  The anticodons of tRNA molecules are given below:
  AGC UUC
  Give the sequence of bases found along the corresponding section of the coding DNA strand.
  UCG AAG
  Is this right? Many thanks.
- April 15, 2009 at 5:41 am #90158
  menu
  Participant
  the sequence of the coding DNA would be:
  TCG AAG
  because DNA has T instead of U
- April 17, 2009 at 8:50 pm #90194
  Darby
  Participant
  If it’s tRNA, it connects to mRNA which was made from the DNA, so you’re leaving out a step.
- April 18, 2009 at 9:34 pm #90204
  MrMistery
  Participant
  no, menu is correct – coding DNA strand has the same sequences as mRNA only with t instead of u
- April 19, 2009 at 3:59 am #90216
  Darby
  Participant
  I don’t think so, since tRNA is the third step –
  tRNA ACG would attach to mRNA UGC which would have come from DNA ACG.
  tRNA UUC would attach to mRNA AAG which would have come from DNA TTC.
- April 19, 2009 at 5:02 am #90217
  menu
  Participant
  Darby, what you have said is right, but that is not what bearcub is asking.
  The DNA codes for the tRNA and the mRNA, therefore you can find the DNA sequence that coded for the tRNA directly from that by finding the corresponding code (including T).
  however what you have done is found the DNA sequence that coded for the mRNA which will be different from what coded for the tRNA
- April 22, 2009 at 1:42 pm #90271
  MrMistery
  Participant
  also, darby, you have it wrong.
  tRNA ACG would attach to mRNA UGC. UGC comes from DNA ACG TEMPLATE STRAND. The coding strand=nontemplate strand for mRNA UGC is TGC.
- April 23, 2009 at 8:16 pm #90326
  Darby
  Participant
  Sorry, you’re right, not used to this particular terminology. Like a lot of things in DNA (exons, anyone-?), it’s pretty counter-intuitive.
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