MCQ Microbiology 34

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The formation of adenosine triphosphate (ATP) is essential for the maintenance of life. In mammalian systems, the number of moles of ATP formed per gram atom of oxygen consumed (the P/O ratio) is 3; in bacteria, however, the P/O ratio may be only 1 or 2. Which of the following is the primary reason for the lower P/O ratio in bacteria?

A. Absence of nicotinamide adenine dinucleotide (NAD)

B. Loss of oxidative phosphorylation coupling sites

C. Less dependence on ATP as an energy source

D. Absence of a nonphosphorylative bypass reaction

E. A less-efficient mesosome


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Category: Microbiology MCQs



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