DNA Is Composed of Two Strands, Only One of Which

question 47

Multiple Choice

DNA is composed of two strands, only one of which typically is used as a template for RNA synthesis. By what mechanism is the correct strand chosen?

• A) Both strands are tried, and the one that works is remembered.
• B) Only one strand has the start codon.
• C) The promoter acts to aim the RNA polymerase.
• D) A start factor informs the system.
• E) It is chosen randomly.

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