Approximately 99% of the microbes in the intestines are obligate anaerobes. We have plenty of blood vessels that can bring oxygen to the tissues of the intestines
Why would there be obligate anaerobes within these areas?
A. The bacteria in the intestines are protected from exposure to the oxygen in the tissues by the lining of the intestines.
B. The bacteria consume all the oxygen in the tissue areas brought by the blood vessels, creating an anaerobic environment.
C.
The inside space of the intestines, where bacteria reside, is highly anaerobic. It is deep inside the body where oxygen cannot reach AND, unlike the surrounding tissues, it is not supplied with blood.
D. The aerobic microbes are outcompeted for nutrients in these areas by the anaerobic microbes.
C
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In the first step of glycolysis, glucose can be phosphorylated because
A) a phosphoanhydride bond has higher energy of hydrolysis than a phosphoester bond. B) the transfer of a phosphate from ATP to glucose is exergonic. C) both the number 2 and 3 carbons can be spontaneously phosphorylated. D) the ketosugar is rapidly phosphorylated at the carbon 1 hydroxyl group. E) both choices A and B
A cell that accumulates lots of mutational damage to its DNA may escape the normal controls of the cell cycle and become ____________________
Fill in the blank(s) with correct word
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a. carbon b. hydrogen c. oxygen d. zinc e. carbon dioxide