WGU BIOCHEMISTRY OA FINAL PAPER
2026 COMPLETE QUESTIONS AND
ANSWERS VERIFIED A+
◉ complex I
Answer: NADH donates electrons and H+ to complex
◉ complex II
Answer: FADH2 donates electrons and H+ to complex
◉ complexes I, III, IV
Answer: Which of the ETC complexes pump H+?
◉ complex II
Answer: Which of the ETC complexes do not pump H+?
◉ cytochrome c
Answer: What protein shuttles electrons from complex III to
complex IV?
◉ coQ
, Answer: What molecule transfers electrons and H+ from both
complex I and complex II to complex III?
◉ matrix
Answer: In what portion of the mitochondrion does the CAC take
place?
◉ complex IV
Answer: At which complex does the following reaction take place?
O2 + 4 e- + 4 H+ → 2 H2O
◉ complex I
Answer: At which complex does the following reaction take place?
NADH + H+ + coQ → NAD + coQH2
◉ complex II
Answer: At which complex does the following reaction take place?
FADH2 + coQ → FAD + coQH2
2026 COMPLETE QUESTIONS AND
ANSWERS VERIFIED A+
◉ complex I
Answer: NADH donates electrons and H+ to complex
◉ complex II
Answer: FADH2 donates electrons and H+ to complex
◉ complexes I, III, IV
Answer: Which of the ETC complexes pump H+?
◉ complex II
Answer: Which of the ETC complexes do not pump H+?
◉ cytochrome c
Answer: What protein shuttles electrons from complex III to
complex IV?
◉ coQ
, Answer: What molecule transfers electrons and H+ from both
complex I and complex II to complex III?
◉ matrix
Answer: In what portion of the mitochondrion does the CAC take
place?
◉ complex IV
Answer: At which complex does the following reaction take place?
O2 + 4 e- + 4 H+ → 2 H2O
◉ complex I
Answer: At which complex does the following reaction take place?
NADH + H+ + coQ → NAD + coQH2
◉ complex II
Answer: At which complex does the following reaction take place?
FADH2 + coQ → FAD + coQH2