[Campbell Biology P.57] Based on Figure 1.8, if a segment of the crystallin gene DNA has th... | Practice Question

Based on Figure 1.8, if a segment of the crystallin gene DNA has the template strand sequence 3'-ACCAAACCGAGT-5', what would be the sequence of the corresponding mRNA molecule produced during transcription?

  • A: 5'-UGGGUUUGGCUCA-3'
  • B: 5'-ACCAAACCGAGT-3'
  • C: 5'-TGGTTTGGCTCA-3'
  • D: 3'-UGGGUUUGGCUCA-5'

Explanation

During transcription, RNA polymerase synthesizes an mRNA molecule that is complementary to the DNA template strand and antiparallel to it. In RNA, uracil U replaces thymine T . Thus, for the template strand 3'-ACCAAACCGAGT-5', the mRNA sequence will be 5'-UGGGUUUGGCUCA-3'.