26. Based on the passage, the authors' statement "If pair consisted of two purines for example, there would not be room
- D. consisting of purine and a pyrimidine would be larger than a pair of
- C. of pyrtimidines would be larger than a pair of purines
- A. of purines would be larger than the space between a sugar and a phospha
- B. of purines would be larger than a pair consisting of a purine and a pyti