Bonding between complementary bases Weak hydrogen bonds form between complementary base pairs. The hydrogen bonds hold the two strands of nucleotides together and maintain the double helix shape of DNA. C pairs Hydrogen bonds are not as strong as chemical bonds. This means they can be easily broken by heat. with G If DNA is exposed to high heat, the hydrogen bonds between the strands break and the A pairs with T molecule loses its structure.

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A: 1.

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Q: DNA

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A:

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