Termination of RNA synthesis is ultimately determined by
A) exhaustion of RNA polymerase activity.
B) special protein factors.
C) terminases.
D) specific nucleotide sequences on the template strand.
Answer: D
You might also like to view...
Using biotechnology, plant breeders attempt to find and incorporate specific resistance genes into plants that lack them. Once a plant has been given a resistance gene, it will have indefinite protection from the associated pathogen.
Answer the following statement true (T) or false (F)
What is the difference between free and attached ribosomes?
A) Free ribosomes are located in the cytoplasm, whereas attached ribosomes are embedded on the endoplasmic reticulum. B) Free ribosomes are readily "used up" by the cell and are replaced frequently, whereas attached ribosomes remain functional for the lifetime of the cell. C) Free ribosomes produce proteins, whereas attached ribosomes produce carbohydrates. D) Free ribosomes produce proteins that are exported from the cell, whereas attached ribosomes make proteins for mitochondria and chloroplasts.
Biomagnification is a significant problem in aquatic communities. Levels of chemicals magnify (increase or accumulate) at each new link in a food chain. Use the following information to estimate the level of chemical X in a large-mouth bass. One alga can accumulate 1 unit of chemical X. Each copepod eats 15 algae. A minnow consumes 10 copepods, each large-mouth bass consumes 20 minnows.
A. 30 units B. 3,000 units C. 20,000 units D. 15 units E. 20 units F. 150 units G. 300 units
Under which circumstances does the zenk gene become active in zebra finches, and what is its effect?
What will be an ideal response?