Concept explainers
Interpretation:
The amount of ATP which is generated per gram of glucose in comparison to the amount of ATP generated per gram of arachidic acid during catabolism should be determined along with whether the result supports the fact that lipids are more effective energy-storing molecules in comparison to carbohydrates.
Concept introduction:
Carbohydrates are considered to be less effective than lipids in terms of releasing per gram consumption. But still, food rich in carbohydrate contents are more preferred over fats containing food. Energy produced by food containing high content of fat is almost double the amount of energy produced by food containing high content of carbohydrates.
Answer to Problem 99CP
The amount of which is generated per gram of glucose = 0.18mole ATP.
The amount of ATP generated per gram of arachidic acid during catabolism is equal to 0.43 mole ATP.
The number of ATP produced by complete catabolism of fat (fatty acid) is much higher than that of glucose (carbohydrate). Also, the energy produced by fat (fatty acid) is almost double the amount of energy produced by glucose (carbohydrate) by the complete catabolism. These results support the fact that lipids are more effective energy-storing molecules in comparison to carbohydrates.
Explanation of Solution
Glucose (a carbohydrate) starts with the glycolysis pathway which converts glucose to pyruvate.The initiation of the glycolysis process requires energy in the form of ATP. Total
Transition reaction: On oxidation, pyruvate converted to acetyl CoA.
Citric acid Cycle:
From all the three reactions, total
Thus, the total
To calculate the amount of
As, fats (lipids) are metabolized within the body through
The first step is the investment of energy when
The number of acetyl
Each molecule
Acetyl
Every Acetyl
Thus, the total number of ATP generated during the cycle is
To calculate the amount of
From the calculation, it is clear that the number of ATP produced by complete catabolism of fat (fatty acid) is much higher than that of glucose (carbohydrate). Also, the energy produced by fat (fatty acid) is almost double the amount of energy produced by glucose (carbohydrate) by the complete catabolism. And these results supportthe factthat lipids (fats) store energy more effectively than carbohydrates.
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