Biology 251 - Genetics » Spring 2021 » Topic 10.2 Quiz

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Question #1
Transcription initiation always immediately switches into the elongation phase after approximately 10 nucleotides of the new RNA are joined up.
A.   False
B.   True
Question #2
Unlike in DNA replication, the transcription bubble does not widen and is sequestered within the RNA polymerase enzyme, preventing a need for single strand binding proteins.
A.   True
B.   False
Question #3
Transcription in bacteria switches from initiation to elongation when:
A.   the transcription bubble is opened.
B.   the first two nucleotides are joined.
C.   sigma factor dissociates from RNA polymerase.
Question #4
Rho-independent transcription termination requires:
A.   transcription of an RNA hairpin and a helicase.
B.   transcription of an RNA hairpin and a string of U residues.
C.   transcription of a string of U residues and a helicase.
D.   transcription of an RNA hairpin and a string of A residues.
Question #5
Rho-dependent transcription termination requires ATP hydrolysis to disrupt hydrogen bonds between the newly synthesized RNA and the DNA template strand.
A.   True
B.   False

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