The prospects for developing a vaccine for the common cold are not promising because
A. many different viruses can cause the common cold
B. there would be virtually no candidates for such a vaccine
C. of the antigenic shift phenomenon
D. funds for this type of research are not available
E. viruses cannot be cultivated in tissue culture medium
Answer: A. many different viruses can cause the common cold
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A fungus that destroys host plant cells by releasing toxins and enzymes would be categorized as which of these?
A. Biotrophic fungi B. Parasitic fungi C. Necrotrophic fungi D. Enzytrophic fungi
Which of the following is a useful mechanism of action for an antibacterial drug?
A. Inhibition of cell wall synthesis B. Interference with RNA and DNA synthesis C. Inhibition of protein synthesis D. All of the choices are correct.
Which of the following is not a similarity supporting the endosymbiont theory?
A. similarity in the DNA of mitochondria and prokaryotes B. similarity in the nucleus of prokaryotes and mitochondria C. similarity in the RNA of mitochondria and prokaryotes D. similarity in the ribosomes of mitochondria and prokaryotes E. All answers support the endosymbiont theory.
The two authors identify different groups in this GE debate. Based on the essays, which of the following statements correctly describes one author's label of the pro-GE groups versus the anti-GE groups?
a. Vasil: the practical pro-GE biotech industry vs. the small, political anti-GE lobby b. Vasil: the pro-GE scientists vs. the anti-GE scientists c. Mittal: the well-financed pro-GE biotech industry vs. rich anti-GE farmers d. Mittal: the global pro-GE political infrastructure vs. the anti-GE organic farming lobby