The three steps that take place in each cycle during PCR occur in which order?
A. DNA denaturation, annealing, and synthesis
B. DNA annealing, denaturation, and synthesis
C. DNA synthesis, denaturation, and annealing
D. None of the choices are correct.
Answer: A
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Researchers generally insert engineered Ti plasmids into plant cells by ________
a. electric shock b. inserting the plasmid into A. tumefaciens and allowing the bacteria to infect a plant c. chemical shock d. coating microscopic bullets with the plasmid and shooting them into a plant cell
A temperature-sensitive (ts) mutation is often due to a ________ mutation that affects protein folding or activity.
A) null B) nonsense C) missense D) silent
The characteristic that makes the muscle cells unique is the relative abundance and organization of
A. collagen fibers. B. gelatinous mass. C. actin and myosin fibers. D. keratin fibers. E. fibroblast cells.
What is the significance of the intersection of the prey isocline and the predator isocline?
a. The two isoclines intersect at the point of equilibrium where neither populationchanges size b. The two isoclines intersect at a point where one is increasing and the other isdecreasing. c. The two isoclines intersect when both populations are decreasing. d. The two isoclines intersect when both populations are increasing.