During the light reaction water is oxidized to form oxygen. This process
A. yields low-energy electrons.
B. yields high-energy electrons.
C. is needed to replace the electron lost by P680 during the light reaction.
D. yields low-energy electrons and is needed to replace the electron lost by P680 during the light reaction.
E. yields high-energy electrons and is needed to replace the electron lost by P680 during the light reaction.
D. yields low-energy electrons and is needed to replace the electron lost by P680 during the light reaction.
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Siderophores from some pathogens remove iron from the host protein(s)
A) lactoferrin. B) transferrin. C) both lactoferrin and transferrin. D) cytochromes.
Starting with the signaling cell, describe what takes place (or list the steps that occur) when a neuron sends a signal to a muscle cell using acetylcholine
What will be an ideal response?
Natasha has just been diagnosed as having a torn diaphragm. This confuses her, since she knows her diaphragm is just above her abdomen whereas she feels the pain in her neck and upper arms. What she is experiencing is an example of ________
A) piloerector pain B) referred pain C) Pacinian pain D) epigastritis
Which of the following statements is FALSE?
a. Potential energy is stored energy; therefore, chemical energy is a type of potential energy. b. Chemical energy refers to the storage of energy in chemical bonds. c. Energy can be defined as the capacity to do work. d. An apple does not have potential energy since it cannot move on its own. e. Work is anything that involves moving matter against an opposing force.