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23 Nov 2019

In the complete aerobic oxidation of glucose, the metabolic pathway the yields the most reducing equivalents and/or ATP’s is

A. Glycolysis from glucose to pyruvate

B. Pyruvate dehydrogenase reaction

C. Citric acid cycle plus the electron transport chain

D. Conversion of glycogen to glucose-6-phosphate to lactate in muscle, followed by its conversion to pyruvate or glucose in the liver.

Please confirm if C is the answer.

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Deanna HettingerLv2
6 Oct 2019
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Related questions

26. How many NET ATP’s can be obtained from THREE (3) molecules of glucose via (only) GLYCOLYSIS under the following conditions:

a. anaerobic conditions:

____________________________________________________________________________________________________________________________________________

b. aerobic conditions:

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27. Under aerobic conditions (glycolysis, the pyruvate dehydrogenase complex, and the citric acid cycle), how many ATP’s can be obtained from TWO (2) molecules of glucose via:

a. substrate level phosphorylation:

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b. oxidative phosphorylation:

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c. net ATP production:

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28. When completely oxidized, how many Acetyl CoA’s will be produced from a 12-CARBON fatty acid chain?

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29. How many cycles of β-oxidation will there be to completely oxidize a 12-CARBON fatty acid chain to Acetyl-CoA’s?

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30. How many ATP’s can be obtained from the oxidation of a 12-CARBON fatty acid via: (aerobic conditions)

a. β-oxidation:

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b. the citric acid cycle:

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c. What is the net production of ATP’s?

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31. How many ATP’s can be obtained from the oxidation of a ten (10) carbon fatty acid? Include the ATP’s produced via the following: (aerobic conditions)

a. substrate level phosphorylation:

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b. oxidative phosphorylation:

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c. net ATP production:

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1. Integrated metabolism

A. A molecule of glucose that you eat can eventually be transformed into part of a fatty acid that you store. Circle the pathways/cycles below that are part of this overall flow of carbon atoms. Cross out any that are not.

Gluconeogenesis, beta-oxidation, citric acid cycle, glycolysis, urea cycle, fatty acid synthesis

B. Trace the metabolic path of this glucose molecule through the enzymes it encounters along the way to being made into fat. Write all the enzymes in the list below into the proper places in the figure below. If the enzyme is not used, write its name in a “not used" column. If it is used, write the enzyme in the order that the carbon atoms from glucose encounter the enzymes.

Pyruvate dehydrogenase, fumarase, aldolase, lactate dehydrogenase, pyruvate kinase, acetyl CoA carboxylase, fatty acid synthase, hexokinase, carnitine acyltransferase, ATP synthase

B. What is the minimum number of glucose molecules that would be necessary to be the carbon source for synthesis of a 16-carbon fatty acid through this pathway?

C. How many net glucose can be made from one molecule of a 16-carbon fatty acid?

2. Describe each cycle/transport system (compounds, compartments, tissues) and explain its purpose:

A. citrate transport system

B. Cori cycle

C. glucose/alanine cycle

3.

Explain the logic of these pathway regulations:

A. Phosphofructokinase, not hexokinase, is the main regulation site of glycolysis.

B. SuccinylCoA inhibits the entry of acetyl CoA into the citric acid cycle.

C. NADH inhibits pyruvate dehydrogenase.

D. Citrate inhibits the citric acid cycle and activates acetyl-CoA carboxylase.

E. Insulin leads to activation of glycogen synthase.

Explain why C is true and why the rest are false:

A: electron transport chain happens before the Krebs cycle

B: a catalyst increases the activation energy barrier of a reaction

C: gluconeogenesis is a metabolic pathway that results in the generation of glucose from non-carbohydrate carbon substrates such as lactate, glycerol, and glucogenic amino acids

D: glycolysis breaks down one molecule of pyruvate to two molecules of glucose

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