Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following is the Complex II of ETS?
Anonymous Quiz
7%
NADH dehydrogenase
5%
ATP synthase
9%
Cytochrome bc1
78%
Succinate dehydrogenase
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
The regulation of oxidative phosphorylation depends on ____________
Anonymous Quiz
7%
Magnitude of ion motive force
60%
Magnitude of proton motive force
23%
Magnitude of electron motive force
10%
None of the mentioned
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Where does oxidative phosphorylation take place?
Anonymous Quiz
2%
Ribosome
11%
Cell membrane
84%
Mitochondria
2%
Nucleus
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
In metabolism, NAD is involved in ____________
Anonymous Quiz
21%
Spontaneous reaction
51%
Redox reactions
12%
Elimination reaction
16%
None of the mentioned
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
What is the proportion of ATP produced by oxidative phosphorylation?
Anonymous Quiz
14%
60%
17%
70%
10%
80%
60%
90%
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Products of glucose oxidation essential for oxidative phosphorylation are ____________
Anonymous Quiz
19%
b) NADPH and ATP
14%
Pyruvate
10%
Acetyl co-A
57%
NADH and FADH2
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which effects the increased levels of hydrogen ions in the inter-membrane space of the mitochondria?
Anonymous Quiz
11%
Decreased levels of chemiosmosis
23%
Decreased levels of oxidative phosphorylation
20%
Increased levels of water in inter-membrane space
47%
Increase ATP production
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
A biological redox reaction always involves:
Anonymous Quiz
14%
a loss of electrons
12%
a gain of electrons.
39%
an oxidizing & reducing agents
34%
all of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
A metabolite with reduced form involves
Anonymous Quiz
28%
a loss of electrons.
34%
a gain of electrons.
31%
both of the above
6%
none of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
TheNADH produced by the oxidation of one acetyl-CoA result in the synthesis of about ___ ATPs.
Anonymous Quiz
10%
1.5
9%
3
79%
2.5
2%
5
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
The FADH2 produced by the oxidation of one acetyl-CoA result in the synthesis of about ___ ATPs.
Anonymous Quiz
87%
1.5
6%
2.5
4%
3
2%
2
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Coenzyme Q is involved in electron transport
Anonymous Quiz
43%
as a covalently attached cytochrome cofactor.
14%
as a water-soluble electron acceptor.
9%
as a water-soluble electron donor.
34%
as a lipid-soluble electron carrier.
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
The cytochrome c oxidase complex
Anonymous Quiz
12%
accepts electrons from cyt c.
20%
pumps 2 protons out of the matrix space.
11%
produces 2 H2O per O2 reduced.
57%
All of the above are correct.
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Inhibitors of respiratory chain are classified in how many types?
Anonymous Quiz
34%
2
23%
3
33%
4
10%
5
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Inhibitors of ETC blocks the respiratory chain at which site?
Anonymous Quiz
6%
Complex-1
9%
Complex-3
10%
Complex-4
74%
All of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Match the following examples of ETC inhibitors
Anonymous Quiz
58%
Complex 4 ——--CO
15%
Complex-4 ——-Thyroxin
12%
Complex-3 ——-Rotenone
15%
Complex-1 ——Dimercaprol
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
What do un-couplers do?
Anonymous Quiz
16%
Prevents transfer of electrons from cytochrome aa3 to molecular oxygen
22%
Blocks the transfer of reducing equivalents from Fe-S to ubiquinone-Q
13%
Prevent transfer of electrons from cytochrome b to cytochrome C1
48%
ETC takes place but inhibits phosphorylation
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which type of inhibitors prevents the transfer of electrons from cytochrome aa3 to molecular oxygen?
Anonymous Quiz
34%
Un couplar
7%
Complex I
44%
Complex IV
15%
None of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following is an example of un-couplers?
Anonymous Quiz
12%
Cyanide
7%
H2S
9%
CO
73%
2,4 dinitrophenol
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following is an example ofphusiological un-couplers?
Anonymous Quiz
38%
thermogenin
22%
2,4 dinitrophenol
9%
oligomycin
31%
all the above