AQA DNA Hybridisation Watch

emma7645
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#1
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Do I need to know the process of DNA hybridisation for the Unit 2 exam?
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Jedidja
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Yeah you do, during semi conservative replication
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ps1265A
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Yes, do you need help understanding it?
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ViciousPenguin
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If someone could explain it in steps that would be great, will help with your revision too;D
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physicsftw
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dna from two organisms being studied obtained
dna of one of the organisms radioactively labelled. The other dna is not labelled
dna strands heated to separate the strands
single strands of dna from the two organisms mixed
dna fragments that are 50% labelled are selected(because they consist of one strand from each organism)
dna fragments heated, the temperature at which the two strands separate is noted
the higher the temperature, the more complementary bases between dna of two organisms so the more hydrogen bonds between the two strands
and so the more closely related the two organisms are
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physicsftw
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(Original post by ViciousPenguin)
If someone could explain it in steps that would be great, will help with your revision too;D
check my comment in the thread if you want the explanations
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ViciousPenguin
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(Original post by physicsftw)
check my comment in the thread if you want the explanations
Thank you! It's nice to read it in simpler points that the text book gives
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ImABigOldTurd
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(Original post by Jedidja)
Yeah you do, during semi conservative replication
I'm afraid you're wrong.

Semi-conservative replication takes part during interphase.

DNA hybridisation is the process whereby scientists can see how similar two strands of DNA from different organisms are.
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Jedidja
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(Original post by ImABigOldTurd)
I'm afraid you're wrong.

Semi-conservative replication takes part during interphase.

DNA hybridisation is the process whereby scientists can see how similar two strands of DNA from different organisms are.
yeah I am, I'm sorry
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ImABigOldTurd
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(Original post by Jedidja)
yeah I am, I'm sorry

I hope you saw my reply before the exam!
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Jedidja
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#11
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(Original post by ImABigOldTurd)
I hope you saw my reply before the exam!
i knew what it was. I just wasnt thinking when i replied. Revision must have been getting to me
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