The following fatty acid enters the B-oxidation spiral. CH,(CH,)4-CH,-CH,-C-OH and the product shown below is produced. CH(CH,),-C-S-COA 9. How many FADH2 are produced? О 10 O 5 O 4 O 1
Electron Transport Chain
The electron transport chain, also known as the electron transport system, is a group of proteins that transfer electrons through a membrane within mitochondria to create a gradient of protons that drives adenosine triphosphate (ATP)synthesis. The cell uses ATP as an energy source for metabolic processes and cellular functions. ETC involves series of reactions that convert redox energy from NADH (nicotinamide adenine dinucleotide (NAD) + hydrogen (H)) and FADH2(flavin adenine dinucleotide (FAD)) oxidation into proton-motive force(PMF), which is then used to synthesize ATP through conformational changes in the ATP synthase complex, a process known as oxidative phosphorylation.
Metabolism
Picture a campfire. It keeps the body warm on a cold night and provides light. To ensure that the fire keeps burning, fuel needs to be added(pieces of wood in this case). When a small piece is added, the fire burns bright for a bit and then dies down unless more wood is added. But, if too many pieces are placed at a time, the fire escalates and burns for a longer time, without actually burning away all the pieces that have been added. Many of them, especially the larger chunks or damp pieces, remain unburnt.
Cellular Respiration
Cellular respiration is the cellular process involved in the generation of adenosine triphosphate (ATP) molecules from the organic nutritional source obtained from the diet. It is a universal process observed in all types of life forms. The glucose (chemical formula C6H12O6) molecules are the preferred raw material for cell respiration as it possesses a simple structure and is highly efficient in nature.
![### Beta-Oxidation of Fatty Acids
#### The following fatty acid enters the β-oxidation spiral:
**Chemical Structure:**
\[ \text{CH}_3(\text{CH}_2)_{14} - \text{CH}_2 - \text{CH}_2 - \text{COOH} \]
#### and the product shown below is produced:
**Chemical Structure:**
\[ \text{CH}_3(\text{CH}_2)_{6} - \text{CO} - \text{S - CoA} \]
#### Question:
How many FADH₂ molecules are produced?
**Answer Options:**
- 10
- 5
- 4
- 1
#### Explanation:
Beta-oxidation breaks down fatty acids into acyl-CoA units and acetyl-CoA. Each cycle of beta-oxidation of a saturated fatty acid results in the production of 1 FADH₂ molecule per cycle.
To determine the number of FADH₂ molecules produced, calculate the number of cycles by comparing the initial and final products.
In the first structure, there are 18 carbons (including the carboxyl carbon when entering the beta-oxidation spiral), and in the final product, there are 8 carbons in total.
Therefore, the difference of 10 carbons between the initial and final products (each pair of carbons will lead to one FADH₂). So the number of FADH₂ produced is:
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