Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell
Indicate whether the statement is true or false
TRUE
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Spiders use which mouthparts for subduing prey?
a. mandibles b. pedipalps c. chelicerae d. maxillae e. labial palps
In a population of 100 Douglas squirrels, the
birth rate is 10 per year and the death rate is 20 per year. The per capita growth rate of Douglas squirrels is ___ per squirrel per year.
a. 0.2 b. 0.1 c. 0.0 d. -0.1 e. -0.2
How many copies of a particular gene of interest are produced from a single template DNA strand after three cycles of PCR?
A) Five B) Three C) Four D) Eight E) Two
What is the difference in the bonding between alpha-helix and beta sheets?
A. Sulfur bridges allow the spring like turns in alpha helices and van der Waals dispersion allows the folds in beta sheets. B. Hydrogen bonding between the amides only occurs in one of these two types of secondary structures. C. Hydrogen bonding always occurs in the alpha helices but only occurs in parallel beta sheets. D. Hydrogen bonding occurs between the amides of adjacent chains in the sheets instead of between the amides in different parts of the helices.