Practice Quiz

Praxis II General Science

Category - Life Science

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The primary difference between DNA and RNA is:
  1. DNA uses thymine, whereas RNA uses uracil.
  2. DNA uses guanine, whereas RNA uses glucosamine.
  3. DNA has a single strand, whereas RNA has two strands.
  4. DNA is produced in animals, whereas RNA is produced in plants.
  5. RNA can exist in prokaryotes, but DNA cannot.
Explanation
Answer: A - RNA uses uracil (U) to pair with adenine (A) whereas DNA uses thymine (T). DNA and RNA are found in all life forms, and both can form in a 2-stranded complex, although RNA is usually found in a single strand.
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