DNA Contains Thymine Where RNA Contains Uracil

question 13

Multiple Choice

DNA contains thymine where RNA contains uracil. What are some of the evolutionary advantages for DNA having thymine rather than uracil? Please select all that apply.

• A) Thymine is more limited in its base-pairing than uracil
• B) Cytosine can be readily converted to thymine
• C) Uracil is recognized by DNA repair systems
• D) Thymine base-pairs using three hydrogen bonds

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