All of the following are forms of oxidation EXCEPT
A) loss of an electron.
B) loss of hydrogen atom.
C) a dehydrogenation event.
D) substrate-level phosphorylation.
E) gain of an oxygen atom and its electrons.
D
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The first step in the establishment of infection is that the organism must
A. invade host tissues. B. attach to host cells. C. evade phagocytes. D. produce toxins.
Which circulation system carries blood from the small intestines to the liver?
a. coronary b. systemic c. hepatic portal d. aortic e. pulmonary
Which of the following statements would not be consistent with the theory for the endosymbiotic origin of mitochondria and chloroplasts?
A. Mitochondria and chloroplasts have some enzymes unique to them. B. Genes encoded within mitochondria and chloroplasts indicate a closer relationship to prokaryotes than do most nuclear genes. C. The composition of the inner membrane of chloroplasts and mitochondria is similar to the plasma membrane of prokaryotic cells. D. Mitochondria and chloroplasts have their own DNA enclosed within a nuclear envelope. E. The composition of the outer membrane of chloroplasts and mitochondria is similar to the plasma membrane of eukaryotic cells.
What is the characteristic lesion of Yersinia pestis?
A. a bubo B. a chancroid C. a soft chancre D. petechiae E. oozing abscesses in the intestinal wall