Significant features of the coupling of an endergonic and an exergonic reaction is that _____.
a) the value of a positive delta G for one of the reactions can be overcome
b) the two reactions have a common intermediate
c) the hydrolysis of ATP can be used to drive the overall reaction
d) all of the choices are correct
Ans: d) all of the choices are correct
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Two bacterial strains have the same genes for metabolizing a carbohydrate, but one is wild-type for a regulatory inducer while the genetic variant does not produce the inducer. Which of the following statements is CORRECT with regard to the metabolic pathway enzymes?
A) The bacteria have the same phenotype. B) The bacteria have the same genotype but different phenotypes. C) The genotypes and phenotypes of the bacteria are the same. D) The bacteria are phenotypically the same but have different genotypes. E) The answer cannot be determined from the information provided.
Many euryarchaeote and crenarchaeote archaeons are ________________, or organisms that thrive in high-temperature environments (some in temperatures as high as 122 °C)
A. hypothermophiles B. hyperthermophiles C. halophiles D. non-halophiles E. basophiles F. acidophiles
An energy-liberating pathway is considered to be
A) metabolic. B) anabolic. C) catabolic. D) hydrogenation. E) all of the above
Which of the following is NOT true regarding an
incomplete digestive system? a. Food enters a saclike gut. b. Food and wastes pass through the same opening. c. Food is only partially digested in this system; therefore, fecal material is good fertilizer. d. This system favors regional specialization. e. There is two-way traffic of materials in this system.