In which of the following ways is DNA replication different from DNA transcription? a. New cells can only be created after transcription has taken place. b. Replication results in mRNA strands while transcription creates new DNA. c. Transcription happens outside the nucleus and replication happens inside the nucleus. d. Thymine is used in replication while uracil is used in transcription.

Biology · High School · Sun Jan 24 2021

Answered on

The correct answer is: d. Thymine is used in replication while uracil is used in transcription.

  • In DNA replication, the DNA molecule is duplicated to produce two identical copies. During replication, thymine (T) pairs with adenine (A) using complementary base pairing.
  • In DNA transcription, a segment of DNA serves as a template to create a complementary mRNA (messenger RNA) molecule. Instead of thymine, the RNA polymerase enzyme synthesizes RNA using uracil (U) as a base, which pairs with adenine (A) in the RNA molecule.
  • The distinction between thymine (found in DNA) and uracil (found in RNA) is a key difference in the nucleotide bases used during DNA replication and transcription, respectively.

Related Questions