The use of the arsenic compound Salvarsan as a treatment for syphilis is credited to ________.
A. Chain
B. Waksman
C. Ehrlich
D. Fleming
Answer: C
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A recombinant vaccine is used to protect against
A. polio. B. diphtheria. C. hepatitis B. D. pertussis.
The genetic diversity within a species of a given region is called the ____
a. biodiversity b. dominance hierarchy c. biogeographic distribution d. biome
e. communityWhen adding Barritt's reagent to your MRVP broth, you see a red color change. This means that acetoin was produced of glucose metabolism.
a. true b. false
Which of the following is not a reason why two children born to the same parents [not identical twins] are unlikely to have the same genetic makeup?
A) Crossing over recombines portions of sister chromatids. B) Fertilization provides a new pairing of chromosomes. C) Each sperm or egg has a random assortment of chromosomes, half from each pair. D) Chromosomes align themselves independently during meiosis I. E) Since though they are produced at different times, all sperm will be genetically different from all other sperm.