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
Forwarded from طـن أمسكيوات
FAD is reduced in which of the reaction of the Kreb’s cycle?
Anonymous Quiz
4%
a) Isocitrate to oxaloacetate
16%
b) Succinyl CoA to Succinate
14%
c) Fumarate to malate
66%
d) Succinate to fumarate
Forwarded from طـن أمسكيوات
Which of the following enzyme catalyzes substrate-level phosphorylation i.e conversion of GDP to GTP?
Anonymous Quiz
9%
a) Malate dehydrogenase
7%
b) Fumarase
11%
c) Isocitrate dehydrogenase
73%
d) Succinyl CoA thiokinase
Forwarded from طـن أمسكيوات
Which of the following enzyme of the TCA cycle catalyzes co-reduction of FAD+ to FADH2?
Anonymous Quiz
5%
a) Isocitrate dehydrogenase
16%
b) Alpha-ketoglutarate dehydrogenase
67%
c) Succinate Dehydrogenase
12%
d) Malate dehydrogenase
Forwarded from طـن أمسكيوات
Which of the following metabolic intermediate activates the TCA cycle?
Anonymous Quiz
37%
a) High NADH/NAD ratio
22%
b) High ADP/ATP ratio
31%
c) High Oxaloacetate
10%
d) None of the above
Forwarded from طـن أمسكيوات
Is important for Synthesis of mg+2
Anonymous Quiz
39%
Succinate Succinyl-CoA
29%
Oxaloacetate
15%
Malate
17%
Succinate
Forwarded from طـن أمسكيوات
Malonate is an inhibitor of
Anonymous Quiz
7%
Aconitase
46%
Succinate dehydrogenase
42%
Malate dehydrogenase
5%
Citrate synthase