What functional group (or groups) of microbes would be most useful in a microbial fuel cell in which electrons are transferred to and from solid metal electrodes? Why?
What will be an ideal response?
Answer: Iron-reducers and iron-oxidizers would be most useful in this type of microbial fuel cell, as they are adapted to transfer electrons to and from solid electron acceptors and donors. Most terminal oxidases and other electron transport proteins are inside the cell wall in the cytoplasmic membrane where they cannot contact solid surfaces. Iron-reducers in particular have electron transport proteins embedded in the outer membrane where they can effectively transfer iron to and from solid redox active surfaces (such as metal electrodes).
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To read the hemolytic reaction accurately on a blood agar plate, the technologist must:
a. hold the plate up to the light, and observe the plate with the light coming from be-hind. b. hold the plate under the light, and observe the plate with the light coming from the top. c. hold the plate over a white background. d. examine the plate using reflected and transmitted light.
Which portion of the brain contains centers for control of body temperature, appetite, and fat metabolism?
a. hypothalamus b. cerebellum
c. midbrain d. thalamus e. pons
According to the data, the crickets at 25°C have greater oxygen consumption per gram of tissue than do the crickets at 10°C. This trend in oxygen consumption is the opposite of that in the mice. The difference in trends in oxygen consumption among crickets and mice is due to their
(A) relative size (B) mode of nutrition (C) mode of internal temperature regulation (D) mode of ATP production
Inductive
What will be an ideal response?