Fats/Proteins

This quiz covers hydrolysis of fats and proteins, deamination, energy yield comparisons

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QUESTION OF
Views #: 3
Questions #: 10
Time: 10 minutes
Pass Score: 80.0%
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Energy Yield of Protein Oxidation

1 pts
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Feeding Fats and Proteins into Respiration Fats hydrolysis (+water) Glycerol Fatty acids โ†’ PGAL โ†’ Acetyl-CoA Proteins hydrolysis Amino acids deamination Glycolysis (PGAL) and Krebs cycle (acetyl-CoA, pyruvate) ATP + CO2 + H2O Fats yield about twice the energy of carbohydrates, gram for gram Proteins yield about the same energy as carbohydrates, gram for gram

Based on the diagram, gram for gram, the complete oxidation of protein yields about how much energy compared to carbohydrates?

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Energy Yield of Fat Oxidation

1 pts
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Gram for gram, how does the energy yield of fat compare to that of carbohydrates when both are fully metabolized?

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Breaking Down Fat Molecules

1 pts

The first step in breaking down fats to produce glycerol and fatty acids is (1), in which the fat molecules are broken down through the addition of water.

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deamination
hydrolysis
glycolysis
oxidation
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Where Glycerol Enters the Pathway

1 pts
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After being converted into PGAL, glycerol from fat hydrolysis is fed into which pathway?

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Where Fatty Acids Enter the Pathway

1 pts

After being broken down into carbon fragments and converted into (1), fatty acids are fed into the respiratory pathway at the same point as pyruvate-derived acetate.

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lactate
glucose
PGAL
acetyl-CoA
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Removing the Amino Group

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The hydrolysis of proteins through the removal of the amino group is one of several ways proteins may be metabolized; this method is known as:

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What Protein Hydrolysis Produces

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True or False: The hydrolysis of protein produces amino acids, which can then be metabolized through several different pathways.

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Review: Oxygen Requirements Across Pathways

2 pts

Sort each process by whether it requires oxygen

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Review: Glucose to Carbon Dioxide and Water

2 pts

Glucose is first broken down by (1) in the cytoplasm. The resulting pyruvate, if oxygen is present, enters the mitochondria, where it is converted to acetyl-CoA and processed through the (2), generating electron carriers that fuel the electron transport chain.

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fermentation
glycolysis
deamination
Krebs cycle
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Review: Total ATP from One Glucose Molecule

1 pts
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Approximately how many ATP molecules can be produced from one glucose molecule when the Krebs cycle and oxidative phosphorylation are both available, compared to glycolysis alone?

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