A scientist mutates a gene in yeast and then looks to see what effect introducing this mutation has on the phenotype in yeast. This is an example of:
A. next-generation sequencing.
B. reverse genetics.
C. forward genetics.
D. positional cloning.
E. transgenic research.
Ans: B. reverse genetics.
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The childhood disease that damages the body defenses and is frequently complicated by secondary infections involving, primarily, Gram-positive cocci is
A. German measles. B. measles. C. mumps. D. chickenpox.
In their experiments to identify the transforming principle, Avery, MacLeod, and McCarty used enzymes that break
down ____.
a. protein, DNA, and RNA b. protein and RNA only c. DNA only d. protein, lipids, and RNA
e. lipids and DNA onlyThe microtubules that overlap in the center of the mitotic spindle are called _______ microtubules.
a. astral b. polar c. kinetochore d. central e. minus-end
During cellular reactions, electrons may be removed from compounds such as glucose and picked up by a coenzyme known as NAD+. When NAD+ gains these electrons, it is said to be
A. oxidized. B. synthesized. C. reduced. D. dehydrated.