Which of these structures is analogous in function to the alveoli of humans?
A) Parabronchi of a bird
B) Spiracles of a grasshopper
C) Trachea of a frog
D) Operculum of a fish
E) Skin of an alligator
A
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If the yellow mottle virus begins its infection of a cell by using its genome as mRNA, which of the following would you expect to be able to measure?
A) replication rate B) transcription rate C) translation rate D) accumulation of new ribosomes E) formation of new transcription factors
Archaea have been found in many microenvironments in the human body. Which of the following microenvironments is most likely to fit with the designation of Archaea as "extremophiles?"
A. The inner ear can withstand increased pressure. B. The gingiva and the gut are anaerobic. C. The temperature of the testes is less than 37°C. D. The surface of the tongue has salt receptors.
Enzymes function as catalysts by
A. bringing the substrates together at the active site correctly oriented for the reaction. B. bringing the substrates together at the active site, in effect concentrating them. C. bringing the substrates together at the active site, in effect concentrating them and bringing the substrates together at the active site correctly oriented for the reaction. D. None of the choices are correct.
Wavelengths of light Blue light has ___ energy than red light, but both forms of light are ____ by green leaves.
a) less, reflected b) less, absorbed c) more, reflected d) more, absorbed