Which of the following statements is false concerning the value ?H?
A) ?H is the change in heat content.
B) ?H is the change in enthalpy.
C) In biology, ?H is basically the same as ?E.
D) A reaction with a positive ?H value is exothermic.
E) ?H = ?E + ?(PV)
Answer: D
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Isolates from CSF that are gram-negative coccobacilli, grow on chocolate agar in CO2 but not blood agar, require factor V but not X, and are nonhemolytic on rabbit or horse blood may be identified as:
a. H. parainfluenzae. b. H. influenzae. c. H. aphrophilus. d. H. ducreyi.
This is an example of _____
1.energy, the capacity to do work
2.activation energy supplied by CO2
3.the effect of temperature and pH on a reaction
4.an electron transfer chain
When ATP releases some energy, it also releases inorganic phosphate. What happens to the inorganic phosphate in the cell?
A) It is secreted as waste. B) It is used only to regenerate more ATP. C) It may be used to form a phosphorylated intermediate. D) It enters the nucleus and affects gene expression.
Which best describe the structure of complex II?
A) An L-shaped structure that spans the membrane and partially extends into the mitochondrial matrix. B) A structure firmly anchored to the membrane by many ?-helices that span the lipid-bilayer. C) Three identical multisubunit enzymes that associate to form a mushroom-shaped structure. D) Has a core structure of three conserved subunits, one of which forms a ?-barrel on the exterior surface of the membrane.