under normal circumstances, it is not possible for adenine to pair up with guanine or cytosine, nor for any other mismatches to occur. describe the two factors that prevent a mismatch from occurring

The chemical structure of adenine only allows it to form a hydrogen bond with thymine. While the structure of guanine allows it to form a hydrogen bond with cytosine. DNA Polymerase will then proofread a strand of DNA to ensure there is no mismatching bases.

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luisvaschetto luisvaschetto · Answer 2 · 2021-12-23T13:30:24+01:00

In DNA, pairs of nucleotides form specific hydrogen bonds between opposite DNA strands.

DNA is a double helix composed of two long strands of nucleotides linked by hydrogen bonds.

In DNA, there are four types of nucleotides, which contain different nitrogen bases (i.e., Adenine, Guanine, Thymine, Cytosine).

Adenine always pairs with Thymine by two hydrogen bonds, while Guanine pairs with Cytosine by three hydrogen bonds.

In conclusion, in DNA, pairs of nucleotides form specific hydrogen bonds between opposite DNA strands.

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