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ira [324]
3 years ago
6

Help please! Can someone please explain to me how the base pairing rule in DNA works and give an example? (no plagiarism please)

Biology
1 answer:
Blababa [14]3 years ago
8 0
DNA is forms a double helix shape/strand. The rule of base pairing is pretty much something that you just need to know by heart. A (adenine), T (Thymine), G (Guanine), and C (Cytosine) and the 4 bases that make up DNA. 

***** The most important part is to know that A always pairs with T and G always pairs with C ***** 

So, the double helix strand of DNA is made up of two strands - kind of like a ladder - one strand is the original, while the other is a replicate of the original strand that is formed through different steps of polymerase reaction etc. 

So, for example, let's say strand 1 has this code: ATGCTAGCTGATCG (I made this up, probably doesn't code for anything). But, knowing this, what will it's replicate of second strand look like? 

Original strand:       ATGCTAGCTGATCG
Replicate Strand:    TACGATCGACTAGC

So, you can see from the above example that to form the replicate strand, you just insert the base that pairs with the one from the original strand. A-T and G-C!

Hope that helped!
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