Why Can a Guanine Not Be Paired with Adenine

question 72

Multiple Choice

Why can a guanine not be paired with adenine?

• A) Guanine is only found in RNA and adenine is found only in DNA.
• B) Guanine can form three hydrogen bonds and adenine can form two.
• C) Guanine can form only two hydrogen bonds and adenine can form three.
• D) Guanine can only pair with thymine.

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