If a DNA molecule contains 20% thymine, how much adenine would it contain?

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Multiple Choice

If a DNA molecule contains 20% thymine, how much adenine would it contain?

Explanation:
Adenine and thymine pair together, and cytosine and guanine pair together, so their amounts are equal in a DNA molecule. If thymine is 20%, adenine must also be 20% to pair with it. The remaining bases (cytosine and guanine) make up the other 60% and are equal, so each is 30%. So, the amount of adenine is 20%.

Adenine and thymine pair together, and cytosine and guanine pair together, so their amounts are equal in a DNA molecule. If thymine is 20%, adenine must also be 20% to pair with it. The remaining bases (cytosine and guanine) make up the other 60% and are equal, so each is 30%. So, the amount of adenine is 20%.

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