Question

pLEASE HELP BIOCHEM

2a Predict all of the following that are consequences of withdrawing oxygen given constant supply of NADH. may have more than one answer

a. Pool of coenzyme Q becomes fully reduced.

b. recycling of NAD+ continues indefinitely

c. rate of NADH oxidation becomes zero owing to a lack of oxidized coenzyme Q(Q) to accept electrons

d.pool of cytochrome C becomes fully oxidized (Cyt Cox).

2.b Choose all the following that are characteristic of Complex 3.

a. recycles oxidized coenzyme Q (Q) for complex 2

b. binds reduced cytochrome C (Cyt C red)

c. accepts electrons from reduced coenzyme Q

d, shifts the pool of coenzyme Q (Q-pool) to the more reduced form (QH2)

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

b. Complex 2

c. Complex 1

d Complex 4

2d Choose all of the following that are characteristics of electron transport chain. may have more than one answer

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

Answer 1

2a) B.Recycling of NADH continues indefinitely.

C. Rate of NADH oxidation becomes zero owing to a lack of oxidized coenzyme Q to accept electrons.

2b) A. Recycles oxidized coenzyme Q for comp complex 2.

2c) B. Complex 2

2d) A. High QH2/Q and cytochrome C reduced /cytcoxidized ratios are results of anaerobic conditions.

D. Of NADH, FADH2,QH2 and cytocred all but FADH2 donate electrons to electron transport chain.