Based on Kirby-Bauer testing, a microbe is determined to be susceptible to both antibiotic X and antibiotic Y. Further testing indicates that antibiotic X has a therapeutic index of 10 whereas antibiotic Y has a therapeutic index of 3. Which antibiotic would be the best choice based on the information given?
A. Antibiotic X
B. Antibiotic Y
C. Either one would be an equally good choice based on the information given.
A. Antibiotic X
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To quantify the environmental contribution of a behavioral trait, scientists turn to ____
a. whole genome sequencing b. heritability c. genome wide association studies d. analysis of innate behaviors e. SNP and haplotype analyses
Which process allows nucleomorphs to be first reduced, and then lost altogether, without the loss of any genetic information from the host cell that ultimately surrounds the nucleomorph?
a. horizontal gene transfer b. meiosis c. conjugation d. phagocytosis e. binary fission
How are peripheral and transmembrane proteins different?
a. Transmembrane proteins are primarily nonpolar, while peripheral proteins are polar. b. Transmembrane proteins are primarily nonpolar, while peripheral proteins are a mixture of polar and nonpolar amino acids. c. Transmembrane proteins are primarily polar, while peripheral proteins are nonpolar. d. Transmembrane proteins are a mixture of polar and nonpolar amino acids, while peripheral proteins are primarily nonpolar.
Frederick Griffith did experiments on genetic transformation. Which of the following statements about his experiments is accurate?
a. Griffith used only pathogenic bacteria in his experiments. b. The combination of living nonencapsulated bacteria and heat-killed encapsulated bacteria did not cause disease. c. Griffith used bacteria in which the nonpathogenic strain was encapsulated but the pathogenic strain was not. d. Griffith found that DNA released from dead (virulent) bacteria entered live (avirulent) bacteria and changed them genetically, causing them to become virulent.