#Question id: 4460
#Unit 3. Fundamental Processes
During initial transcription, the active center of RNA polymerase is translocated forward relative to the DNA template and synthesizes short transcripts before aborting, then repeats this cycle until it escapes the promoter. Three models have been proposed to account for this;
i. Polymerase moves along the DNA.
ii. The front part of the enzyme moves along the DNA, but because of a flexible region within the enzyme, the back part of the enzyme can remain stationary at the promoter.
iii. The enzyme remains stationary and pulls the DNA into itself.
#Question id: 12039
#Unit 7. System Physiology – Animal
#Question id: 4553
#Unit 3. Fundamental Processes
The NtrC protein (nitrogen regulatory protein C)—stimulates transcription of the glnA gene, this protein is an activator of σ54-RNA polymerase. Which of the following given characteristics about this protein is incorrect?
#Question id: 614
#Unit 1. Molecules and their Interaction Relevant to Biology
What type of inhibition is indicated by the data graphed below?
#Question id: 10860
#Unit 10. Ecological Principles
Plants use nectar to