A ________ is a polysaccharide layer that lies outside the cell wall and is not easily removed.
Fill in the blank(s) with the appropriate word(s).
capsule
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Which procedure is most useful in quantifying the active transcription of botulism toxin genes in a can of food that is contaminated?
A. End-point PCR B. DNA hybridization C. Southern blot D. Real-time PCR
You are excited because you just purchased a male guppy that has red, blue and green colors on its fins and tail. Your guppies at home do not have this combination of colors. You place the new male in with three females for mating purposes. After three weeks you have many new baby guppies and with the new color combination. This is an example of which type of selection?
A. Natural B. Environmental C. Analogous D. Convergent E. Artificial
What is common to all of the oxidation reactions in the Citric acid cycle?
A. They are all decarboxylation reactions. B. They all lead to substrate-level phosphorylation of ADP to generate ATP. C. They all lead to the generation of NADH. D. They are all characterized by a loss of electrons from an organic molecule coupled to the reduction of an electron acceptor.
What biochemical test is used to distinguish between the Enterobacteriaceae and the Pasteurellaceae?
A) lactose fermentation B) oxidase test C) motility D) pigment production E) Gram stain