12
QuizMultiple Choice

Lab: Building Proteins from RNA — Unit test

Question 12 • 26-27 Biology A

Which of the following difference between DNA and RNA allows them to perform their unique functions?

Answer
A
DNA contains ribose, while RNA contains deoxyribose.
B
DNA is single-stranded, whereas RNA is double-stranded.
C
DNA contains thymine, while RNA contains uracil.
D
RNA is found only in the nucleus, while DNA is found only in the cytoplasm.

Explanation

DNA uses the base thymine, while RNA uses uracil in its place. This difference helps distinguish their sequences and roles; for example, DNA stores genetic information, while RNA helps use that information to make proteins. Choice A reverses the sugars: DNA contains deoxyribose and RNA contains ribose. Choices B and D also reverse or misstate where these molecules are typically found and how they are structured.

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