Mice that are injected with only the R strain of Streptococcus pneumoniae
a. become sick for prolonged periods of time.
b. stay healthy, because their immune systems can kill this strain easily.
c. are killed, because R strain cells are deadly.
Answer: b. stay healthy, because their immune systems can kill this strain easily.
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The process in which one or more nucleic acid molecules are rearranged or combined to produce a new nucleotide sequence is called
A. transduction. B. conjugation. C. transformation. D. recombination.
It is often said that development is a two-step process. What two steps are likely to be referred to here?
What will be an ideal response?
Endergonic reactions in cells do not happen spontaneously, that is, they require an input of energy. Coupling such reactions with exothermic ones, such as the hydrolysis of ATP drives the reaction forward. Certain organisms are able to bypass the need for ATP or a proton motive force by ________.
A. using glucose as a direct source of energy in a process similar to spontaneous combustion B. tightly coupling an endergonic and an exergonic oxidation so the endergonic oxidation can drive the completion of the exergonic one in a process known as electron bifurcation C. circumventing the need for endergonic reactions D. tightly coupling an endergonic and an exergonic reduction so the exergonic reduction can drive the completion of the endergonic one in a process known as electron bifurcation
The Southern Hemisphere lacks which of the following biomes?
a. tundra b. taiga c. savanna d. tundra and taiga e. tundra and savanna