A DNA microarray is a tool that owes its existence to earlier genomics investigations. What essential contribution of genomics makes microarrays possible?
A) recently improved RNA sequencing technologies
B) continuously improving methods of gene cloning
C) more efficient techniques for cDNA synthesis
D) knowledge of which DNA sequences to synthesize for the array
D
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Where would you find smooth muscle tissue in your body?
A) in your heart B) in the walls of your stomach C) attached to bones D) None of the above is correct.
Why is combination drug therapy less likely to lead to resistance than single drug therapy?
A) In the presence of multiple drugs, the mutation rate of HIV decreases. B) The drugs improve the immune system so that it's better able to find and remove virus particles. C) The likelihood of one virus spontaneously mutating to be resistant to three different drugs is extremely small. D) There are fewer side effects associated with combination drug therapy, and the appearance of resistance is directly proportional to the severity of side effects.
Which method of asexual reproduction would be most likely to occur in a wild population of plants? This method enables the parent plant to produce multiple offspring that start to grow away from the parent plant.
A. production of suckers from the parent plant B. growth of stolons C. growth of rhizomes D. The root develops slips which can produce new offspring.
What stimulates secretion of testosterone by Leydig cells?
A. FSH B. Testosterone C. Estradiol D. LH E. Progesterone