Which of the following would be most appropriate for disposal of cultures on agar plates?
normal trash receptacle
sharps container
biohazard bag or bin
biohazard bag or bin
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Which of the following are NOT found within the photosynthetic gene cluster of Rhodobacter (a purple phototrophic bacterium)?
A) genes encoding reaction center and light-harvesting photocomplexes B) genes encoding proteins involved in phycobiliprotein biosynthesis C) genes encoding proteins involved in bacteriochlorophyll biosynthesis D) genes encoding proteins involved in carotenoid biosynthesis
Archaeal promoters are most similar to those of ________.
A. eukaryotes B. bacteria C. viruses D. both viruses and bacteria
Griffith, a British microbiologist, used bacteria and mice to demonstrate the process of transformation. During transformation,
A. genetic material is transferred from one bacterial cell to another. B. a bacterial chromosome produces an exact copy of itself. C. the nucleus of a mouse cell repairs itself when damaged by bacterial infection. D. a bacterial cell is transformed into a spore during unsuitable environmental conditions. E. DNA from an infected mouse cell changes bacteria from a nonpathogenic to a pathogenic form.
Indicate the differences between DNA and RNA. (Select all that apply)
a. RNA is much smaller. DNA, by contrast, averages more than 100 million base pairs long. b. RNA contains a sugar called ribose whereas DNA contains a sugar called deoxyribose. c. RNA contains adenine, cytosine, thymine and guanine whereas DNA contains adenine, cytosine, thymine and uracil. d. RNA consists of only one nucleotide chain whereas DNA is a double helix.