Please help!! Biochem 2c, Identify all of the protein complexes of the electron
ID: 135472 • Letter: P
Question
Please help!! Biochem
2c, Identify all of the protein complexes of the electron transport chain that catalyzed the formation of reduced coenzyme Q(QH2) choose all that apply
a, Complex 3 of the electron transport chain
b. Complex 2 of the electron transport chain
c. Complex 1 of the electron transport chain
d Complex 4 of the electron transport chain
2d Choose all of the following that are characteristics of electron transport chain. may have more than one answer this question is refering to REDOX reaction in ETC Cyt means Cytochrome C in oxidized and reduced forms
a. high QH2/ Q and Cytochrome C reduced/ CytCoxidized ratios are a result of anaerobic conditions
b. Of Q, CytCox, and 1/2 O all accept electrons
c If QH2/Q and Cyt Cred/Cyt Cox ratios are high than NADH/NAD+ and FADH2/FAD ratios will be high in the matrix
d. Of NADH, FADH2, QH2 and CytoCred all but FADH2 donate electrons to electron transport chain
Explanation / Answer
Answer 2c
c. Complex 1 of the electron transport chain: NADH-Q reductase or NADH-dehyrdogenase
b. Complex 2 of the electron transport chain :Succinate Q-reductase complex
a, Complex 3 of the electron transport chain: QH2- cytochrome c reductase complex
d Complex 4 of the electron transport chain : Cytochrome C oxidase complex
Answer 2d
b) Of Q, CytCox, and 1/2 O all accept electrons because
oxygen is the ultimate acceptor of electron, it becomes reactive and combine with proton to form metallic water
d) Of NADH, FADH2, QH2 and CytoCred all but FADH2 donate electrons to electron transport chain because
FADH2 produced during reduction of succinate also hand over its electron and proton to ubiquinone or co-enzyme Q through FeS complex.