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Chapter 17: Q. 17.120 (page 616)

Why are there no base pairs in DNA between adenine and guanine or thymine and cytosine? (17.3)

Short Answer

Expert verified

Two purines and two pyrimidines combined would just take up too much room in the region between the two strands.

Step by step solution

01

Step 1:Given information

We have to find out the why are there no base pairs in DNA between adenine and guanine or thymine and cytosine.

02

Step 2:Explanation

Two purines and two pyrimidines would take up far too much room to fit between the two strands. Only adenine and thymine, as well as cytosine and guanine, may form hydrogen bonds in that region.

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