To identify the formula that represents anaerobic respiration, you'll want to look for a specific set of characteristics in the formulas provided. Anaerobic respiration typically occurs in the absence of oxygen and involves the conversion of glucose into energy, producing either lactic acid (in animals) or ethanol and carbon dioxide (in yeast and some plants).
Here are the key points to recognize:
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Substrate: Look for a formula that starts with glucose (C6H12O6) as it is the main substrate used in anaerobic respiration.
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By-products:
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For anaerobic respiration in humans and some animals: The end products are typically lactic acid (C3H6O3) and energy (ATP). The simplified reaction can be expressed as: \[ C6H12O6 \rightarrow 2 C3H6O3 + \text{Energy (ATP)} \]
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For fermentation in yeast: The products are usually ethanol (C2H5OH) and carbon dioxide (CO2). The simplified reaction can be represented as: \[ C6H12O6 \rightarrow 2 C2H5OH + 2 CO2 + \text{Energy (ATP)} \]
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No Oxygen: Emphasize that the process happens in the absence of oxygen, so any formula that includes oxygen as a reactant should be ruled out.
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Energy Yield: Anaerobic respiration typically yields less energy compared to aerobic respiration. If the formulas indicate a high energy yield with oxygen, they are not representative of anaerobic respiration.
By looking for a formula that includes glucose and has lactic acid or ethanol and carbon dioxide as products, and is characterized by the absence of oxygen, you can identify the formula representing anaerobic respiration.
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