Differences between mitochondrial and E. coli electron transport chains include the following:
A. The E. coli chain contains a different array of cytochromes.
B. Higher P/O values are observed in E. coli.
C. The electron transport chain does not involve membranes in E. coli.
D. The fundamental principles on which they operate are different.
Answer: A
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______________ is permanently frozen soil
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Which statement is true?
a. All animals with hearts have closed circulatory systems. b. Birds and crocodiles have pulmocutaneous circulation. c. All blood circulated through fish hearts is deoxygenated. d. Double circulation is a feature of all mammals and some birds.
Typically, one sperm fertilizes an oocyte because ____
a. an acid solution is released that kills all other sperm b. special organelles within the oocyte eject more than one sperm c. changes occur to the oocyte's protein coat that prevent further penetration d. follicle cellular space is only wide enough for one sperm e. usually only one sperm arrives at the oocyte
During which phase does crossing-over occur?
a. interphase b. prophase I c. metaphase I d. prophase II e. metaphase II