Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following enzyme catalyzes substrate-level phosphorylation i.e conversion of GDP to GTP?
Anonymous Quiz
10%
Malate dehydrogenase
69%
Succinyl CoA thiokinase
9%
Fumarase
13%
Isocitrate dehydrogenase
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following is not the irreversible reaction of Kreb's cycle?
Anonymous Quiz
13%
Isocitrate dehydrogenase
31%
Citrate synthas
23%
Alpha-ketoglutarate dehydrogenase
33%
Malate dehydrogenase
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
TCA cycle is also known as the amphibolic pathway (function both in oxidative and synthetic processes). Which of the following is a correct statement regarding
Anonymous Quiz
14%
Alpha-ketoglutarate plays a critical role in amino acid metabolism
17%
Oxaloacetate is an intermediate for gluconeogenesis and fatty acid synthesis
8%
Succinyl CoA is involved in ketone body metabolism
61%
All of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following metabolic intermediate activates the TCA cycle?
Anonymous Quiz
28%
High NADH/NAD
28%
High ADP/ATP ratio
35%
Oxaloacetate
9%
None of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
What is the Other name of Krebs Cycle
Anonymous Quiz
4%
EMP pathway
3%
Glycolate Cycle
4%
Glyoxylate Cycle
89%
Citric acid cycle
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Kreb’s cycle begins with the creation of six carbon compounds as a result of a reaction between two carbon compounds namely
Anonymous Poll
11%
Succinic Acid and pyruvic acid
7%
Maleic acid and acetyl CoA
7%
Fumaric acid and Pyruvic acid
75%
Acetyl CoA and Oxaloacetic Acid
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Why is the TCA cycle the central pathway of metabolism of the cell?
Anonymous Quiz
55%
Its intermediates are commonly used by other metabolic reactions
20%
All other metabolic pathways depend upon it
15%
It occurs in the center of the cell
11%
None of the above
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Niacin (B3) is important in all the following krebs reactions except:
Anonymous Quiz
12%
Isocitrate dehydrogenase
19%
Malate dehydrogenase
17%
α -ketoglutarate dehydrogenase
52%
Succinate dehydrogenase
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which of the following is NOT a site for regulation of the citric acid cycle?
Anonymous Quiz
17%
Citrate synthase
10%
Isocitrate dehydrogenase
63%
Pyruvate dehydrogenase
10%
α-ketoglutarate dehydrogenase
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
Which enzyme in the citric acid cycle is inhibited by ATP?
Anonymous Quiz
30%
Citrate synthase
17%
Fumarase
27%
α-ketoglutarate dehydrogenase
26%
Isocitrate dehydrogenase
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
What activates the dehydrogenases in the citric acid cycle?
Anonymous Quiz
12%
ATP
10%
ADP
31%
NADH
47%
Ca2+
Forwarded from Dr.Shimaa Munther Biochemistry MCQ
What is the effect of increased oxaloacetate concentration on the citrate synthase reaction?
Anonymous Quiz
30%
Increased rate of reaction
43%
The effect depends on the concentration of acetyl-CoA
9%
No effect on the rate of reaction
18%
Decreased rate of reaction
Forwarded from طـن أمسكيوات
The citric acid cycle
Anonymous Quiz
68%
A. It is the final common pathway
19%
B. The first common Pathway
13%
C. The second common pathway
Forwarded from طـن أمسكيوات
The citric acid cycle also has a central role in
Anonymous Quiz
7%
A. gluconeogenesis,
2%
B. lipogenesis,
3%
C. interconversion of amino acids.
88%
D. All above
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات
Forwarded from طـن أمسكيوات