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How do you do this question ? About DNA with bases including a table

http://gyazo.com/ef69e68f16bbadd42784063c7a3d6be9

How do you do that ? I looked at the MS and still dont understand
Original post by User32432432
http://gyazo.com/ef69e68f16bbadd42784063c7a3d6be9

How do you do that ? I looked at the MS and still dont understand


Okay, so you know that A pairs with T, and C pairs with G.

So if there are 19 C bases in Strand B, there will be 19 G bases in Strand A, and vice versa.

There are 9 A bases in strand B so there will be 9 T bases in Strand A.

Therefore 9+19+26=54
In the question you are told there are 74 bases in total, so 74-54=20.

So there are 20 A bases in Strand A, and 20 T bases in Strand B.

:smile:
Reply 2
Original post by x-Sophie-x
Okay, so you know that A pairs with T, and C pairs with G.

So if there are 19 C bases in Strand B, there will be 19 G bases in Strand A, and vice versa.

There are 9 A bases in strand B so there will be 9 T bases in Strand A.

Therefore 9+19+26=54
In the question you are told there are 74 bases in total, so 74-54=20.

So there are 20 A bases in Strand A, and 20 T bases in Strand B.

:smile:

Thank you

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