A metabolic pathway must provide the desired chemical (metabolite) at the rate required for cellular and tissue function. To accomplish this, the reaction sequence ________.
a) includes only reactions are essentially irreversible
b) includes only chemical reactions that are energetically favorable under the conditions for which synthesis is required
c) all of the choices are correct
d) "couples" energetically unfavorable reactions to ATP hydrolysis in order to drive the reaction toward the required product
Ans: d) "couples" energetically unfavorable reactions to ATP hydrolysis in order to drive the reaction toward the required product
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A phenol red glucose broth with a Durham tube has been inoculated and incubated. After 48 hours, the broth is turbid and bright yellow and approximately half of the contents of the Durham tube contains bubbles. Interpret these results.
a. The organism will ferment lactose as well. b. The organism is fermenting glucose. c. The organism is an obligate anaerobe. d. The organism is fermenting lactose and producing ethanol and CO2.
External ear defects include all of the following, EXCEPT
A. Anotia B. Microtia C. Post-Auricular Appendages D. Pre-Auricular Appendages E. Pre-Auricular Pits
Immediate hypersensitivity is ________ mediated, and delayed type hypersensitivity is ________ mediated
a. antibody / cell b. cell / antibody c. Th1 / IgE d. IgG / Th2
Which bacteria were FIRST discovered in Swiss cheese?
a. Serratia b. lactic acid bacteria c. Actinomyces d. propionic acid bacteria