To reduce one molecule of O2, ________ electron(s) must be passed through the electron transport chain and ________ molecule(s) of NADH is(are) oxidized.

A) 4; 2
B) 2; 1
C) 1; 1
D) 1; 2
E) 4; 4


A) 4; 2

Biology & Microbiology

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Which of the following techniques exemplifies phenotypic rescue in a host cell?

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