What is the role of gyrase in transcription?
a. It assists in the formation of termination hairpin structures.
b. It melts the DNA duplex to form the transcription bubble.
c. It removes the positive supercoils generated ahead of RNA polymerase.
d. It breaks the hydrogen bonds between DNA and RNA during transcription termination.
e. It removes the negative supercoils generated behind RNA polymerase.
Ans: c
You might also like to view...
The separation of duplicated chromosomes into two new nuclei is known as ____
a. mitosis b. cytokinesis c. binary fission d. meiosis e. fertilization
What are the two principle factors that lead to microevolution?
A. Horizontal gene transfer and evolutionary mechanisms B. New genetic variation and gene duplication C. New genetic variation and evolutionary mechanisms D. Natural selection and migration
Batteries in your flashlight are examples of ____ energy
Fill in the blank with the appropriate word.
Which would be most likely to be fossilized?
A. a small worm with all soft body parts. B. a thick-shelled oyster that lives under water. C. a small herb growing at the top of a mountain. D. an elephant trapped in a tar pit. E. a thick-shelled oyster that lives under water and an elephant trapped in a tar pit.