In which ribosome site would you find the uncharged tRNA?
A) E site
B) A site
C) P site
Ans: A) E site
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Which combination of nonfermenting gram-negative bacilli are oxidase positive, but do not grow on MacConkey agar within 24 to 48 hours
a. B. cepacia and Pseudomonas stutzeri b. Brevundimonas dimunuta and Pseudo-monas veronii c. P. aeruginosa and R. insidiosa d. B. vesicularis and Acidovorax facilis
On occasion, a stressful factor such as disease, starvation, or drought kills a large proportion of the individuals in a
population, producing ____ that dramatically reduces the population size.
a. natural selection b. artificial selection c. a lethal mutation d. a founder effect e. a population bottleneck
HIV, the virus that causes AIDS in humans, does not infect other animals, but only certain cells in the human body. Why?
What will be an ideal response?
Which of the following infectious agents is least likely to be damaged by UV exposure?
bacteria viruses fungi protozoa prions