Forwarded from طـن أمسكيوات
FAD is Reduced in Which of the Reactions of the Kreb’s Cycle
Anonymous Quiz
6%
(a) Isocitrate to oxaloacetate
20%
(b) Succinyl CoA to Succinate
17%
(c) Fumarate to malate
57%
(d) Succinate to fumarate
Forwarded from طـن أمسكيوات
Citric Acid Cycle take place in :
Anonymous Quiz
78%
A) mitochondrial
5%
B) cytoplasm
17%
C) Both A&B
Forwarded from طـن أمسكيوات
Because TAC functions in both oxidative and synthetic processes, it is amphibolic.
Anonymous Quiz
87%
True
13%
False
Forwarded from طـن أمسكيوات
condensation of acetyl group of acetyl CoA with oxaloacetate catalyzed by :
Anonymous Quiz
32%
A) Citrate synthetase
56%
B) Citrate synthase
7%
C) Aconitase
5%
D) isocitrate dehydrogenase
Forwarded from طـن أمسكيوات
In Fluroacetate poisoning which enzyme is inhibited:
Anonymous Quiz
21%
A) isocitrate dehydrogenase
58%
B) aconitase
12%
C) succinate thiokinase
8%
D) citrate synthase
Forwarded from طـن أمسكيوات
The reaction of Alpha-ketoglutarate formation yields the first NADH and first CO2 in CAC.
Anonymous Quiz
66%
True
34%
False
Forwarded from طـن أمسكيوات
Where does the first oxidation process take place?
Anonymous Quiz
37%
A) citrate formation
12%
B) citrate isomerization
41%
C) alpha-ketoglutarate formation
10%
D) succinyl-CoA formation
Forwarded from طـن أمسكيوات
The reaction of Succinyl-CoA formation release the second CO2 and produced the second NADH of CAC.
Anonymous Quiz
70%
True
30%
False
Forwarded from طـن أمسكيوات
α-Ketoglutarate dehydrogenase complex is inhibited by:
Anonymous Quiz
45%
A) its products, NADH and succinyl CoA.
14%
B) phosphorylation
41%
C) Both A&B
Forwarded from طـن أمسكيوات
α-Ketoglutarate dehydrogenase complex is activated by:
Anonymous Quiz
58%
A) Ca2+
21%
B) dephosphorylation
21%
C) Both A&B
Forwarded from طـن أمسكيوات
The organs that perform gluconeogenesis which are (liver and kidney) use for thiokinase enzymes the Co-enzyme GDP copy converted to GTP.
Anonymous Quiz
85%
True
15%
False
Forwarded from طـن أمسكيوات
The only step in CAC that you have substrate level energy:
Anonymous Quiz
55%
A) convert succinyl-CoA to succinate by succinate thiokinase
26%
B) oxidative decarboxylation of alpha-ketoglutarate to succinyl-CoA by alpha-ketoglutarate complex
10%
C) citrate isomerized to isocitrate by aconitase
9%
D) None of the above
Forwarded from طـن أمسكيوات
Each NADH results in formation of ——, and of FADH2 ——.
Anonymous Quiz
11%
A) 1.5ATP, 2.5ATP
3%
B) 1.8ATP, 3.2ATP
84%
C) 2.5ATP, 1.5ATP
3%
D) 3.2ATP, 1.8ATP
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات
Product of Krebs cycle essential for oxidative phosphorylation is ______.
Anonymous Quiz
12%
a) NADPH and ATP
9%
b) Acetyl CoA
6%
c) CO2 and oxaloacetate
74%
d) NADH and FADH2
Forwarded from طـن أمسكيوات
A single molecule of glucose generates _________ molecules of acetyl CoA, which enters the Krebs cycle.
Anonymous Quiz
10%
a) 4
7%
b) 3
65%
c) 2
18%
d) 1
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات
Which of the intermediate of the Kreb’s cycle is utilised in the formation of amino acids?
Anonymous Quiz
10%
a) Citric acid
6%
b) Malic acid
4%
c) Isocitric acid
80%
d) 𝛼-ketoglutaric acid
Forwarded from طـن أمسكيوات
Acetyl CoA is formed from pyruvate by______reaction.
Anonymous Quiz
19%
a) Dehydration
5%
b) Reduction
68%
c) Oxidative decarboxylation
8%
d) Dephosphorylation
Forwarded from طـن أمسكيوات
Which of the following is not formed during the Krebs cycle?
Anonymous Quiz
85%
a) Lactate
2%
b) Isocitrate
3%
c) Succinate
10%
d) Both (a) and (b)
Forwarded from طـن أمسكيوات
The entry of pyruvate into the TCA cycle is inhibited by the presence of a high cellular concentration of:
Anonymous Quiz
22%
a) Pyruvate
35%
b) NADH
26%
c) Coenzyme A
16%
d) AMP