In order to get around the lack of ability of prokaryotes to remove introns from precursor RNA, it may be necessary to
A. use the DNA directly.
B. use the DNA after it has been processed.
C. use different promoters.
D. turn mRNA into cDNA.
E. use the DNA directly AND use the DNA after it has been processed.
D
You might also like to view...
Which of the following statements about bird respiration is false?
A. Air flowing through the air channels in the lungs moves in the opposite direction of blood flowing through the blood capillaries in the lungs. B. Oxygen is exchanged between the air and the bloodstream in the lungs, but not in the air sacs. C. The unidirectional flow of air through a bird's lungs maintains a larger concentration gradient for diffusion than can be obtained through tidal breathing. D. Bird lungs receive fresh air during both inhalation and exhalation. E. It takes two ventilation cycles for a single breath of air to move through a bird's respiratory system.
In protostomes, into what does the blastopore develop?
a. mouth b. coelom c. anus d. germ layer
Research has shown that commercial fisheries place selective pressure on fish populations by
harvesting mostly the ____ fish, resulting in ____.
a. young; aging populations b. larger; maturity at smaller sizes c. smaller; maturity at larger sizes d. prereproductive; declining birth rates e. postreproductive; no change in population size
The practice of women bringing food to other women during times of crisis may have been triggered by which neurotransmitter?
A) GABA B) serotonin C) dopamine D) oxytocin