Conditional mutations are more likely to result from a mutation caused by which of the following alterations to the coding region of a gene?
A) tautomeric shift
B) deletion
C) four bases added within a short region of a gene
D) base addition
E) X rays
A
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Which cell line has demonstrated a consistent season-to-season isolation frequency of influenza viruses?
a. Primary monkey kidney b. Lung fibroblasts c. HeLa d. HEp-2
Humans contract Chagas disease when the reduviid bug defecates while taking a blood meal and the parasites in the feces are rubbed or scratched into the bite wound or onto mucosal surfaces. Which stage in the blood infects the host cells?
a. Amastigote b. Epimastigote c. Trypomastigote d. Promastigote
Gingko trees are known to lose their leaves at a certain time each year throughout the United States. Based on this information, Gingko trees in China must behave the same way. These statements are an example of:
A. inductive reasoning B. deductive reasoning C. a theory D. an experiment
Vitamin ____ is water soluble
a. A b. C c. D d. E e. K