The tagline of an energy drink states that the drink will provide a burst of energy that is long lasting, without the jitters. Which of the following would not be found in the drink?
A. caffeine
B. pantothenic acid
C. niacin
D. riboflavin
E. B1
Answer: A
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As the first steps in creating recombinant DNA molecules were taking place, scientists immediately realized that modifying the genetic information in ____________________, a bacterium from the human gut, could be potentially dangerous
Fill in the blank(s) with correct word
People with the disease known as sickle-cell anemia are often better able to survive malaria because of
a. balanced polymorphism. b. heterozygote advantage. c. frequency dependent selection. d. disruptive selection. e. stabilizing selection.
Looking at your results of the Ames test using bacteriological agar medium plates lacking the amino acid histidine, you find that there are many colonies growing on the agar. How do you interpret this result?
A. The drug being tested has no inhibitory effect on the bacterium; therefore, it is not a good antibiotic to give for treatment of disease. B. The chemical being tested is mutagenic. C. The bacterium has turned its operon genes on, producing proteins necessary for growth. D. The bacterium does not have any plasmids, so it cannot grow on the medium.
Recombinant DNA is any DNA that
a. has been cut by restriction enzymes. b. is at least four to eight base pairs in length. c. has had its gene sequence rearranged. d. consists of base pairs from two or more organisms e. is none of these.