Transcription is sometimes described as a process in which RNA is "copied" from the template strand of DNA. This statement is potentially misleading because:
A)RNA nucleotides contain ribose and so cannot be an exact copy of DNA.
B)the RNA transcript and the DNA template strand are antiparallel.
C)the RNA transcript has a complementary sequence of bases to the template strand.
D)RNA molecules contain uracil instead of thymine
E)All of these choices are correct.

Question

Quizplus · Accepted Answer

All of these choices are correct.

A) RNA nucleotides contain ribose instead of deoxyribose, so the RNA transcript cannot be an exact copy of the DNA template strand.

B) The RNA transcript is synthesized in a 5' to 3' direction, whereas the DNA template strand is read in a 3' to 5' direction. This means that the RNA transcript and DNA template strand are antiparallel.

C) The RNA transcript has a complementary base sequence to the template strand of DNA, which is what makes it possible for the RNA molecule to function as a template for protein synthesis.

D) RNA uses uracil instead of thymine. Uracil pairs with adenine in RNA, whereas thymine pairs with adenine in DNA.

Transcription Is Sometimes Described as a Process in Which RNA