When 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
Ans: a. true
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You just discovered a new virus. This virus infects heart muscle, where it causes inflammation. This virus has a very high mutation rate. Which of the following is the best strategy for finding a treatment for this virus?
A) Develop a vaccine from living viruses. B) Identify the receptor this virus uses and develop an enzyme that blocks the receptor. C) Encourage infected individuals to engage in heart-strengthening exercise. D) Develop a drug that blocks the host's ribosomes, which the virus uses to produce its proteins.
Viruses have typical cellular structure like other living organisms.
Answer the following statement true (T) or false (F)
Mating an individual expressing a dominant phenotype, but whose genotype is unknown, with an individual
expressing the corresponding recessive phenotype is an example of a(n): a. heterozygous cross. b. F1 cross. c. F2 cross. d. parental cross. e. test cross.
Which of the following is most likely to favor the evolution of highly virulent parasites?
A. Transmission between unrelated members of the population B. Transmission from parent to offspring C. Multilevel selection (both within and among populations, occupying different hosts) D. Strong effects on a subset of a population with a specific susceptible genotype E. Mutualism between hosts and parasites