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Purine or pyrimidine?

Exercise and reference answers

Left
Purine
Items
  1. Item
    Adenine
    Answer
    Purine
  2. Item
    Guanine
    Answer
    Purine
  3. Item
    Double ring
    Answer
    Purine
  4. Item
    Cytosine
    Answer
    Pyrimidine
  5. Item
    Thymine
    Answer
    Pyrimidine
  6. Item
    Single six-ring
    Answer
    Pyrimidine
Right
Pyrimidine
Instructions
Swipe left for Purine, right for Pyrimidine.

Explanation

_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 14 'DNA Structure and Function', sections 14.1-14.6_
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