If water were nonpolar it would not form hydrogen bonds. At normal room temperatures this nonpolar water would be ________.
A. a liquid
B. a gas
C. a solid
Answer: B
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Bioluminescence is controlled by the gene regulatory mechanism called quorum sensing, wherein the
A) depletion of oxygen is detected by an inducer molecule which activates transcription of the lux operon. B) accumulation of an inducer molecule activates transcription of the lux operon. C) absence of light activates an inducer molecule which activates transcription of the lux operon. D) host tissues produce an autoinducer molecule which activates transcription of the lux operon.
A light microscope with an objective lens numerical aperture of 0.65 is capable of allowing two objects 400 nm apart to be distinguished when using light with a wavelength of 420 nm.
Answer the following statement true (T) or false (F)
Exotoxins are ________.
A. antiphagocytic factors B. lipopolysaccharides C. proteins secreted by living bacterial cells D. secretions that always target nervous tissue E. only released after a cell is damaged or lysed
It is the middle of the fruiting season for apples. Some apples are maturing on the tree; others are only beginning to develop from ovaries. Which of the following would MAXIMIZE the size of the apples on the tree?
a. Remove the larger and largest apples from the tree b. Remove the flowers and the smallest apples from the tree c. Add fertilizer