This experiment employed a 1% agarose gel, and very large DNA fragments remained at the top of the gel. If a 0.1% agarose gel was used, instead of the 1% agarose gel, would the large DNA fragments migrate further down the gel?
A) Yes
B) No
A) Yes
Feedback: Agarose acts as a size filter. The greater the concentration of agarose, the harder it is for large fragments to migrate. The lower the concentration of agarose, the further the large fragments can migrate.
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The spores of a fern are
(a) produced by mitosis within the sporangium. (b) diploid cells. (c) the first cells of the gametophyte generation. (d) both a and b.
Increasing global population, overcrowding and international travel have contributed to many changes in epidemiological trends of infectious disease. Which of the following would have been just as likely to occur a century ago as today?
A. The incidence of bubonic plague in humans, transmitted via the rat flea, is gradually increasing in the United States with most of the cases reported in the west. B. Gonorrhea, one of the oldest known STDs, is becoming increasingly difficult to treat due to multi-drug resistance strains of Neisseria gonorrhea. C. An individual was placed under a government-ordered isolation after traveling while infected with a drug resistant strain of Mycobacterium tuberculosis. D. West Nile encephalitis, a zoonotic disease caused by a virus first isolated in Uganda, is now a world-wide pandemic in human and animals.
The ____________________ is the neuron extension that receives information from other neurons. Fill in the blank(s) with the appropriate word(s)
All of the following pertain to glycolysis EXCEPT
A) Occurs during formation B) Involves reduction of NAD C) Occurs without oxygen D) Degrades glucose to CO2 and H2O E) Ends with formation of pyruvic acid