In the procedure known as gel electrophoresis, DNA fragments are separated by their:
a. color
b. size
c. GC content
d. pH tolerance
Ans: b. size
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Which of the following is an example of the use of the binomial system devised by Linnaeus?
A. O157:H7 B. Enterobacteriaceae C. Enterobacteriales D. Escherichia coli
_____, such as sea squirts, share features of the chordate body plan during early development
A. Tunicates B. Echinoderms C. Chordates D. Cephalochordates
You are working on a drug to affect heart function, and you are told to direct the drug to change the relaxation of the ventricles. If your drug is successful, it will alter
A. the oxygen content in the blood. B. the force of contraction of the atria. C. venous pressure. D. diastolic pressure. E. systolic pressure.
Why is insulin produced by genetically engineered E. coli cells superior to insulin obtained from animal sources?
a. Animal insulin has a shorter life span than insulin produced using recombinant DNA techniques. b. Recombinantly produced insulin contains human rather than animal sequences, reducing the chances of an allergic response. c. Animal insulin is more difficult to purify than recombinantly produced insulin. d. Recombinantly produced insulin has a much higher activity level. e. Recombinantly produced insulin is easier to obtain than insulin from animals.