Many normal genes that have important functions in cells sometimes acquire mutations that cause the products of these genes to have negative effects, including the development of cancer. These genes are called:
A. oncogenes.
B. proto-oncogenes.
C. tumor suppressor genes.
D. viral genes.
B
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You arrive late to a biological seminar. However, just as you enter the room, you hear the speaker referring to the "amino end" and the "carboxyl end" of a macromolecule. Immediately, you know that they are talking about a:
A. carbohydrate. B. protein. C. lipid. D. DNA.
The bacterium Alcaligenes eutrophus naturally produces polyhydroxybutyrate (PHB), a biodegradable thermoplastic. In 1992, Poirier, et al., reported in the journal Science that the two genes responsible for the production of PHB in bacteria had been introduced into the plant Arabidopsis thaliana, and it was demonstrated that the plants produced PHB. What type of vector was likely used to introduce the bacterial genes into the A. thaliana?
A. BAC. B. YAC. C. Ti plasmid. D. viral vector. E. BAC or YAC.
The concept of endosymbiosis is widely accepted. What kind of relationship is it?
A. Neither organism benefits. B. One organism in the partnership benefits and the other is harmed. C. One organism benefits but the other is not affected. D. Both organisms in the partnership benefit.
All pathogens known to infect humans have been identified at this point in time
Indicate whether the statement is true or false