________ is an aerobic chemolithotrophic process that ultimately oxidizes ammonia to nitrate, whereas ________ is a form of anaerobic respiration involving the oxidation of an organic compound using an oxidized nitrogenous compound, such as nitrate, as the terminal electron acceptor.
A. Ammonification; denitrification
B. Ammonification; nitrification
C. Denitrification; nitrification
D. Nitrification; denitrification
Answer: D
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Refer to Figure 31-5. Which structure is involved in respiration?
A. 5 B. 6 C. 7 D. 8
Myosin is a contractile protein found in muscles that is composed of three pairs of subunits, two heavy chains, and two pairs of two different types of light chains, for a total of six subunits. Myosin contains what level(s) of protein structure?
A) primary only B) primary and secondary only C) primary, secondary, and tertiary only D) primary, secondary, tertiary, and quaternary
Which of the following represents the lowest level of chromatin packaging?
a. 10 nm fiber b. chromonema fiber c. nucleosome d. 30 nm fiber e. interphase chromatid
If the complex protein assemblage of the prokaryotic flagellum arose by the same general processes as those of the complex eyes of advanced molluscs (such as squids), then
A) natural selection cannot account for the rise of the prokaryotic flagellum. B) ancestral versions of this protein assemblage were either less functional, or had different functions, than modern prokaryotic flagella. C) science should accept the conclusion that neither of these structures could have arisen by evolution. D) we can conclude that both of these structures must have arisen through the direct action of an intelligent "designer." E) Both A and C are true.